Hey @sameer.uppal,
This question looks identical to FlowableException: Could not update Flowable database schema: unknown version from database: '6.5.0.6'.
The explanation about the different versions is explained in FlowableException: Could not update Flowable database schema: unknown version from database: '6.5.0.6'.
By the looks of it it seems like you didn’t upgrade all your services to 6.5.0.
Cheers,
Filip