Solution manager and Change Request are not consistent error while creating task list

Currently we are using SAP Solution Manager 7.1 SP8.

When I activate the Change Request Management in a Maintenance Project and try to create Task List. Getting an error: 'Solution Manager and Change Request Management are not consistent'

When i perform consistency check, It was successful and there is No error.

All the RFC Connection Test and Authorization Tests, are successful.

Any Pointers please, will really appreciate your help.

Regards