ORA-43925
A character column in the index definition has an unsupported collation.
Cause
An attempt was made to create a bitmap join index or a domain index with a key or join condition that contained a character column with a declared collation other than BINARY, USING_NLS_COMP, USING_NLS_SORT, USING_NLS_SORT_CS, USING_NLS_SORT_VAR1, or USING_NLS_SORT_VAR1_CS. Only these listed collations are supported by this type of the index.
Action
Use one of the supported collations for the key column or join condition.