Deletion of Target group on the CRM UI model leads to authorisation error

User deleted a Target group on SAP CRM Web UI. But logged in again to view the model got the error "You are not authorized to use the graphical modeler".

When I debugged Web ui 'Edit segmentation model' button, I found that FM

" CRM_MKTTG_SEG_IL_TG" return error "TG <XYZ> is already deleted". I am not able to figure out if there is any note missing or deletion of TG on UI didn't work correctly. Users will create/delete TG's as per their requirements.

Please let me know if anyone has faced this same issue.

Thanks

Sunita