2809746 - Cannot drop or create a role; errors 11116 and 11165 - SAP ASE

After running sybmigrate, syssrvroles is not as expected and a role cannot be dropped or created:

drop role my_select_role with override
go

Msg 11116, Level 16, State 1
Server 'ASE', Line 1
Cannot drop role or login 'my_select_role' because it does not exist in this server.

create role my_select_role
go

Msg 11165, Level 16, State 1
Server 'ASE', Line 1
A user, group, login or login profile with the name 'my_select_role' already exists in this server.

SAP Adaptive Server Enterprise (ASE) 15.7 & 16.0

KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem