We had the similar issue with objects in ID when running our cutover simulation.
According to SAP note 0001407454, we need to find the object ids and then run the queries mentioned in the note for the corresponding DB and then share the results with SAP over a customer message.
SAP didn't seem to respond back with anything positive for a long time and with almost a day lost we decided to be a bit adventurous. Upon deleting the object ids from the db, the issue was fixed and we were able to activate the objects in ID.
Hope this helps.