How to purge objects in recyclebin that's not physically in recyclebin?

One of the PK column is showing as recycle bin name? This is Oracle 12.1.0.2 on Solaris.

CONSTRAINT_NAME                   C TABLE_NAME            INDEX_NAME                        INVALID STATUS--------------------------------- - --------------------- --------------------------------- ------- --------BIN$OKDzqPSxAITgU6gopOZC9g==$0    P CTRAC_DOCM     CTRAC_DOCM_CTDOCM_ID_PK                          ENABLED

When I view the recycle bin, its empty.

SYS:hsco1 > select * from dba_recyclebin where OWNER='SCOAUT';no rows selected

I want to rename the above constraint. is this doable?