More than one dangerous goods master record was found

What causes this issue?

The system could not determine a unique dangerous goods master record to
be checked, as non-distinct validity areas have been specified for a
material and dangerous goods regulation.

System Response

The system terminates the dangerous goods check and writes a
corresponding message to the log.

How to fix this error?

Call the IMG activity <LS>Specify Dangerous Goods Regulations</>.
Check the dangerous goods regulations for overlapping validity areas.

Error message extract from SAP system. Copyright SAP SE.