2790961 - Error 2941 State 4 when alter encryption key dual master with external key SAP ASE

Attempting to alter the dual master key to add external key encryption fails with error 2941 State 4:

1> alter encryption key dual master with passwd 'mypassdualword' modify encryption with external key
2> go
Msg 2941, Level 16, State 4:
Server 'ASE', Line 1:
Invalid option 'external key' specified to modify key 'sybencrdualmasterkey'.

• SAP Adaptive Server Enterprise (ASE) 16.0 SP03 PL06 and higher
• Database Encryption
• Hardware Security Module (HSM)

CR819246, CR#819246, 819246 , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed