2951112 - "The selected file is used by other files and cannot be deleted" error shows when delete some model in SAP Analytics Cloud (SAC)

• Error shows when delete some model although in related objects field it shows that this model is currently not used in any stories or processes
• Error message: "The selected file is used by other files and cannot be deleted" and it also indicate the model is used by 1 private file

• SAP Analytics Cloud (Enterprise) 2020.14.6

SAP Cloud for Planning, sc4p, c4p, cforp, cloudforplanning, Cloud for Analytics, Cloud4Analytics, CloudforAnalytics, Cloud 4 Planning, BOC, SAPBusinessObjectsCloud, BusinessObjectsCloud, BOBJcloud, BOCloud., SAC, SAP AC, Cloud-Analytics, CloudAnalytics, SAPCloudAnalytics,Error, Issue, System, Data, User, Unable, Access, Connection, Sac, Connector, Live, Acquisition, Up, Set, setup, Model, BW, Connect, Story, Tenant, Import, Failed, Using, Working, SAML, SSO, sapanalyticscloud, sap analytical cloud, sap analytical cloud, SAC, sap analyst cloud, connected, failure, stopped, failed , KBA , LOD-ANA-AUT , SAC Authentication / Login , Bug Filed