diff --git a/backend/src/utils/tenantFullExport.ts b/backend/src/utils/tenantFullExport.ts
index 810023d..f032169 100644
--- a/backend/src/utils/tenantFullExport.ts
+++ b/backend/src/utils/tenantFullExport.ts
@@ -414,6 +414,45 @@ const prepareCommunicationRoomsForImport = (exportData: TenantFullExport) => {
     }
 }
 
+const cleanupImportedCommunicationRooms = async (client: any, exportData: TenantFullExport) => {
+    const rows = exportData.tables.communication_rooms || []
+    if (!rows.length) return 0
+
+    const tenantById = new Map((exportData.tables.tenants || []).map((tenant) => [
+        Number(tenant.id),
+        {
+            id: Number(tenant.id),
+            name: tenant.name,
+            short: tenant.short,
+        },
+    ]))
+    let cleaned = 0
+
+    for (const row of rows) {
+        const tenantId = Number(row.tenant_id)
+        const key = String(row.key || "")
+        const tenant = tenantById.get(tenantId)
+        if (!tenantId || !key || !tenant) continue
+
+        const alias = tenantRoomAlias(tenant, key)
+        const result = await client.query(
+            `
+                update communication_rooms
+                set matrix_room_id = null,
+                    parent_space_room_id = null,
+                    matrix_alias = $3,
+                    updated_at = now()
+                where tenant_id = $1 and key = $2
+            `,
+            [tenantId, key, alias]
+        )
+
+        cleaned += result.rowCount || 0
+    }
+
+    return cleaned
+}
+
 const prepareColumnValue = (value: any, isJsonColumn: boolean) => {
     if (!isJsonColumn || value === null || typeof value === "undefined") return value
     if (typeof value === "string") return value
@@ -585,6 +624,11 @@ export const importTenantFullExport = async (
             importedTables.push({ table, rows: count })
         }
 
+        const cleanedCommunicationRooms = await cleanupImportedCommunicationRooms(client, exportData)
+        if (cleanedCommunicationRooms) {
+            importedTables.push({ table: "communication_rooms_matrix_reset", rows: cleanedCommunicationRooms })
+        }
+
         await refreshSequences(client, columnsByTable)
         await client.query("commit")