Message Oracle ORA-37527 - (XSCHGDFN01) SESSION values of dimension string are being automatically deleted.

ERROR(XSCHGDFN01) SESSION values of dimension string are being automatically deleted.
CAUSEWhen using CHGDFN to rebuild the hash index of a TEXT or NTEXT dimension, SESSION values were encountered.
ACTIONRecreate the SESSION values after the CHGDFN command completes. Information about the deleted values has been written to the trace file.