Overlap with a text variable or a frame

What causes this issue?

You have tried to include a text variable or a frame in the current
report text. However, this action would create an overlap with
another text variable or a frame. Text variables and frames cannot
overlap each other.

System Response

The action has been cancelled.

How to fix this error?

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

Error message extract from SAP system. Copyright SAP SE.