No left outer join can be defined here

What causes this issue?

You have tried to add a join.
The tables and links defined do not allow a join to be added here
Note that ABAP SQL does not support the following situations:
The right-hand table of a left-outer join is also the right-hand table
of another joins, that means:
a right table of a left-outer joins can only be linked with a left-hand
table.
A right-hand table of a left-outer joins is the left-hand table of
another left-outer join.

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

System Response

The desired changes have been cancelled.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.