Release prerequisites of codes & and & conflict

What causes this issue?

Two <GL:release_point>release points</> each stipulate release by the
other as a prerequisite. This is not possible.

How to fix this error?

Check the release prerequisites of the two codes in the specified
<GL:release_strategy>release strategy</>. Only one release point can
make release by the other a prerequisite.

Error message extract from SAP system. Copyright SAP SE.