Message Oracle ORA-37105 - (XSVPART05) Only variables dimensioned by a CONCAT PARTITION TEMPLATE can have string partitions.

ERROR(XSVPART05) Only variables dimensioned by a CONCAT PARTITION TEMPLATE can have string partitions.
CAUSEUser attempted to create an external partition on a partitioned variable, but the variable was dimensioned by a RANGE or LIST partition template.
ACTIONDeclare the partition INTERNAL instead of EXTERNAL, or use a CONCAT partition template in place of the RANGE or LIST partition template.