No hazard-inducing subs. found for Mat &1, ModeTransCat &2, ValidArea &3

What causes this issue?

No identification for the hazard-inducing substance was found for
material &V1& for mode-of-transport category &V2& in validity area &V3&
in the dangerous goods master, although the <ZH>UN collective number</>
indicator is set.
This could be due to the following, for example:
No hazard-inducing substance was assigned to the dangerous goods master
record.
A Customizing entry was deleted.

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?

Edit the hazard-inducing substance in the corresponding data record in
the dangerous goods master.

Error message extract from SAP system. Copyright SAP SE.