Deletion program has been canceled

What causes this issue?

An error has occurred on deleting the database tables.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check the database tables JITHD (call header), JITIT (components
groups), JITCO (call components), JITTE (call texts), JITED (assigned
IDocs).

Error message extract from SAP system. Copyright SAP SE.