diff --git a/api-v3/src/asset-master/inventory-structure.service.ts b/api-v3/src/asset-master/inventory-structure.service.ts
index 9424d9f..c5d155b 100644
--- a/api-v3/src/asset-master/inventory-structure.service.ts
+++ b/api-v3/src/asset-master/inventory-structure.service.ts
@@ -20,6 +20,7 @@ import type { CreateInventoryStructureDto, InventoryStructureKind } from './dto/
 import { AssetHistoryService } from './asset-history.service';
 
 type StructureTypeRow = { id: string; code: string; name: string };
+type FamilyParent = { id: string; code: string; name: string };
 type FamilyRow = {
   id: string;
   code: string;
@@ -27,9 +28,8 @@ type FamilyRow = {
   level: 'INSTALLATION' | 'SUBINSTALLATION';
   legacyTypeCode: string | null;
   informationLabels: string[];
-  parentFamilyId: string | null;
-  parentFamilyCode: string | null;
-  parentFamilyName: string | null;
+  parentFamilyIds: string[];
+  parentFamilies: FamilyParent[];
 };
 type ParentRow = {
   id: string;
@@ -101,10 +101,15 @@ export class InventoryStructureService {
       SELECT family.id,family.code,family.name,family.level,
         family.legacy_type_code AS "legacyTypeCode",
         family.information_labels AS "informationLabels",
-        parent.id AS "parentFamilyId",parent.code AS "parentFamilyCode",parent.name AS "parentFamilyName"
+        COALESCE((SELECT JSONB_AGG(rule.parent_family_id ORDER BY parent.name,parent.code)
+          FROM inventory_family_parent_rules rule
+          JOIN inventory_families parent ON parent.id=rule.parent_family_id
+          WHERE rule.child_family_id=family.id),'[]'::jsonb) AS "parentFamilyIds",
+        COALESCE((SELECT JSONB_AGG(JSONB_BUILD_OBJECT('id',parent.id,'code',parent.code,'name',parent.name) ORDER BY parent.name,parent.code)
+          FROM inventory_family_parent_rules rule
+          JOIN inventory_families parent ON parent.id=rule.parent_family_id
+          WHERE rule.child_family_id=family.id),'[]'::jsonb) AS "parentFamilies"
       FROM inventory_families family
-      LEFT JOIN inventory_family_parent_rules rule ON rule.child_family_id=family.id
-      LEFT JOIN inventory_families parent ON parent.id=rule.parent_family_id
       WHERE family.is_active=true
       ORDER BY family.level,family.name,family.code
     `)) as FamilyRow[];
@@ -201,7 +206,7 @@ export class InventoryStructureService {
           AssetInformationStatus.DRAFT,
           AssetOperationalStatus.UNKNOWN,
           AssetDataOrigin.MANUAL,
-          dto.kind === 'EMPRESA' ? 'Maestro manual de Empresas F5.1' : 'Estructura manual de Inventario F5.1',
+          dto.kind === 'EMPRESA' ? 'Maestro manual de Empresas F6' : 'Estructura manual de Inventario F6',
           dto.kind === 'EMPRESA' ? 'inventory-master:empresa' : `inventory-structure:${dto.kind.toLowerCase()}`,
           family ? `Clasificación técnica: ${family.code} · ${family.name}` : null,
           principal.userId,
@@ -218,11 +223,7 @@ export class InventoryStructureService {
         }
 
         const versionNumber = await this.history.capture(
-          manager,
-          id,
-          AssetVersionChangeType.CREATED,
-          principal,
-          request,
+          manager,id,AssetVersionChangeType.CREATED,principal,request,
         );
         await manager.query(`
           INSERT INTO asset_context_history (
@@ -230,38 +231,28 @@ export class InventoryStructureService {
             change_reason,asset_version_number,source,request_id,created_by
           ) VALUES ($1,$2,$3,NULL,CURRENT_TIMESTAMP,$4,$5,'WEB',$6,$7)
         `, [
-          id,
-          parent?.id ?? null,
-          operationalAreaId,
-          dto.kind === 'EMPRESA' ? 'Alta manual de Empresa independiente F5.1' : 'Alta manual de estructura de Inventario F5.1',
-          versionNumber,
-          request.requestId,
-          principal.userId,
+          id,parent?.id ?? null,operationalAreaId,
+          dto.kind === 'EMPRESA' ? 'Alta manual de Empresa independiente F6' : 'Alta manual de estructura de Inventario F6',
+          versionNumber,request.requestId,principal.userId,
         ]);
         const created = await this.loadView(manager, id);
         await this.audit.record({
           ...administrationAuditContext(principal, request),
           action: AuditAction.ASSET_CREATED,
-          entityType: 'asset',
-          entityId: id,
+          entityType: 'asset',entityId: id,
           afterData: created as unknown as Record<string, unknown>,
           metadata: {
-            versionNumber,
-            inventoryStructureKind: dto.kind,
-            inventoryFamilyId: family?.id ?? null,
-            inventoryFamilyCode: family?.code ?? null,
+            versionNumber,inventoryStructureKind: dto.kind,
+            inventoryFamilyId: family?.id ?? null,inventoryFamilyCode: family?.code ?? null,
             operatorOwnership: false,
           },
         }, manager);
         return created;
       });
     } catch (error) {
-      if (isUniqueViolation(error)) {
-        throw new ConflictException({
-          code: 'ASSET_CODE_ALREADY_EXISTS',
-          message: 'Ya existe un registro con ese código',
-        });
-      }
+      if (isUniqueViolation(error)) throw new ConflictException({
+        code: 'ASSET_CODE_ALREADY_EXISTS',message: 'Ya existe un registro con ese código',
+      });
       throw error;
     }
   }
@@ -272,12 +263,9 @@ export class InventoryStructureService {
       : `SELECT id,code,name FROM asset_types WHERE lower(code)=lower($1::text) AND is_active=true LIMIT 1`;
     const params = kind === 'EMPRESA' ? [] : [TYPE_CODE_BY_KIND[kind as Exclude<InventoryStructureKind,'EMPRESA'>]];
     const rows = (await manager.query(sql,params)) as StructureTypeRow[];
-    if (!rows[0]) {
-      throw new ConflictException({
-        code: 'INVENTORY_STRUCTURE_TYPE_NOT_CONFIGURED',
-        message: `El nivel ${kind} no está configurado`,
-      });
-    }
+    if (!rows[0]) throw new ConflictException({
+      code: 'INVENTORY_STRUCTURE_TYPE_NOT_CONFIGURED',message: `El nivel ${kind} no está configurado`,
+    });
     return rows[0];
   }
 
@@ -288,22 +276,18 @@ export class InventoryStructureService {
   ): Promise<ParentRow | null> {
     const expectedType = PARENT_TYPE_BY_KIND[kind];
     if (!expectedType) {
-      if (parentId) {
-        throw new BadRequestException({
-          code: 'INVENTORY_ROOT_MUST_NOT_HAVE_PARENT',
-          message: kind === 'EMPRESA'
-            ? 'Una Empresa es un maestro independiente y no puede tener padre'
-            : 'Un Departamento es un registro raíz y no puede tener padre',
-        });
-      }
+      if (parentId) throw new BadRequestException({
+        code: 'INVENTORY_ROOT_MUST_NOT_HAVE_PARENT',
+        message: kind === 'EMPRESA'
+          ? 'Una Empresa es un maestro independiente y no puede tener padre'
+          : 'Un Departamento es un registro raíz y no puede tener padre',
+      });
       return null;
     }
-    if (!parentId) {
-      throw new BadRequestException({
-        code: 'INVENTORY_STRUCTURE_PARENT_REQUIRED',
-        message: `Para crear ${kind.toLowerCase()} primero tenés que elegir su ${expectedType}`,
-      });
-    }
+    if (!parentId) throw new BadRequestException({
+      code: 'INVENTORY_STRUCTURE_PARENT_REQUIRED',
+      message: `Para crear ${kind.toLowerCase()} primero tenés que elegir su ${expectedType}`,
+    });
     const rows = (await manager.query(`
       SELECT asset.id,asset.code,asset.name,type.code AS "typeCode",
         asset.inventory_family_id AS "inventoryFamilyId"
@@ -314,12 +298,10 @@ export class InventoryStructureService {
     `, [parentId])) as ParentRow[];
     const parent = rows[0];
     if (!parent) throw new NotFoundException({ code: 'INVENTORY_STRUCTURE_PARENT_NOT_FOUND', message: 'El registro padre no existe' });
-    if (parent.typeCode.toLowerCase() !== expectedType) {
-      throw new BadRequestException({
-        code: 'INVENTORY_STRUCTURE_PARENT_INVALID',
-        message: 'La jerarquía requerida es Departamento → Área → Yacimiento → Instalación → Subinstalación',
-      });
-    }
+    if (parent.typeCode.toLowerCase() !== expectedType) throw new BadRequestException({
+      code: 'INVENTORY_STRUCTURE_PARENT_INVALID',
+      message: 'La jerarquía requerida es Departamento → Área → Yacimiento → Instalación → Subinstalación',
+    });
     return parent;
   }
 
@@ -338,12 +320,10 @@ export class InventoryStructureService {
       LIMIT 1
     `,[parent.id])) as IdRow[];
     const areaId=rows[0]?.id;
-    if (!areaId) {
-      throw new ConflictException({
-        code:'INVENTORY_STRUCTURE_AREA_ANCESTOR_MISSING',
-        message:'La ubicación seleccionada no pertenece a un Área válida',
-      });
-    }
+    if (!areaId) throw new ConflictException({
+      code:'INVENTORY_STRUCTURE_AREA_ANCESTOR_MISSING',
+      message:'La ubicación seleccionada no pertenece a un Área válida',
+    });
     return areaId;
   }
 
@@ -367,12 +347,13 @@ export class InventoryStructureService {
     });
     const rows = (await manager.query(`
       SELECT family.id,family.code,family.name,family.level,
-        family.legacy_type_code AS "legacyTypeCode",
-        family.information_labels AS "informationLabels",
-        parent.id AS "parentFamilyId",parent.code AS "parentFamilyCode",parent.name AS "parentFamilyName"
+        family.legacy_type_code AS "legacyTypeCode",family.information_labels AS "informationLabels",
+        COALESCE((SELECT JSONB_AGG(rule.parent_family_id ORDER BY rule.parent_family_id)
+          FROM inventory_family_parent_rules rule WHERE rule.child_family_id=family.id),'[]'::jsonb) AS "parentFamilyIds",
+        COALESCE((SELECT JSONB_AGG(JSONB_BUILD_OBJECT('id',parent.id,'code',parent.code,'name',parent.name) ORDER BY parent.name,parent.code)
+          FROM inventory_family_parent_rules rule JOIN inventory_families parent ON parent.id=rule.parent_family_id
+          WHERE rule.child_family_id=family.id),'[]'::jsonb) AS "parentFamilies"
       FROM inventory_families family
-      LEFT JOIN inventory_family_parent_rules rule ON rule.child_family_id=family.id
-      LEFT JOIN inventory_families parent ON parent.id=rule.parent_family_id
       WHERE family.id=$1::uuid AND family.is_active=true
       LIMIT 1
     `, [familyId])) as FamilyRow[];
@@ -382,10 +363,19 @@ export class InventoryStructureService {
       code: 'INVENTORY_FAMILY_LEVEL_INVALID',
       message: 'La clasificación técnica no corresponde al nivel seleccionado',
     });
-    if (kind === 'SUBINSTALACION' && family.parentFamilyId !== parent?.inventoryFamilyId) {
-      throw new BadRequestException({
+    if (kind === 'SUBINSTALACION') {
+      if (!parent?.inventoryFamilyId) throw new BadRequestException({
+        code:'INVENTORY_PARENT_FAMILY_REQUIRED',
+        message:'La Instalación padre debe tener una clasificación técnica válida',
+      });
+      const [compatible]=(await manager.query(`
+        SELECT 1 AS ok FROM inventory_family_parent_rules
+        WHERE child_family_id=$1::uuid AND parent_family_id=$2::uuid
+        LIMIT 1
+      `,[family.id,parent.inventoryFamilyId])) as Array<{ok:number}>;
+      if (!compatible) throw new BadRequestException({
         code: 'INVENTORY_SUBINSTALLATION_FAMILY_PARENT_INVALID',
-        message: 'La Subinstalación elegida no pertenece a la clasificación de la Instalación seleccionada',
+        message: 'Ese tipo de Subinstalación no es compatible con la clasificación de la Instalación seleccionada',
       });
     }
     return family;
@@ -398,13 +388,8 @@ export class InventoryStructureService {
           : kind === 'YACIMIENTO' ? 'YAC'
             : kind === 'INSTALACION' ? 'INST'
               : 'SUB';
-    const readable = name
-      .normalize('NFD')
-      .replace(/[\u0300-\u036f]/g, '')
-      .toUpperCase()
-      .replace(/[^A-Z0-9]+/g, '-')
-      .replace(/^-+|-+$/g, '')
-      .slice(0, 48) || 'REGISTRO';
+    const readable = name.normalize('NFD').replace(/[\u0300-\u036f]/g, '').toUpperCase()
+      .replace(/[^A-Z0-9]+/g, '-').replace(/^-+|-+$/g, '').slice(0, 48) || 'REGISTRO';
     return `${prefix}-${readable}-${randomUUID().slice(0, 8).toUpperCase()}`.slice(0, 120);
   }