SAP Message 26306 - Cannot create content version for &1

Diagnosis
You want to create a content version for a migrated original.

System Response
The original application file &V1& was migrate without a contentversion in the Knowledge Provider. The original is physically still insecure storage.
You cannot create content versions for this type of original.

Procedure
Check in the original without a new content version. You can create anew content version after processing it.