Does OGG later patch overwrite a previous patch?

Hi,

Before installing Oracle GoldenGate 19.1.0.0.210720 patch, the patches listed are:

/opt/oracle/product/ogg/19.1.0/OPatch-> ./opatch lspatches

31908556;

OPatch succeeded.

After installing the Oracle GoldenGate 19.1.0.0.210720 patch 33038567, the result becomes:

/opt/oracle/product/ogg/19.1.0/OPatch-> ./opatch lspatches

33038567;

OPatch succeeded.

The previous patch 31908556 is gone. Even in "opatch lsinventory" output, there's no information on the old patch.

/opt/oracle/product/ogg/19.1.0/OPatch-> ./opatch lsinv | grep 31908556

/opt/oracle/product/ogg/19.1.0/OPatch->

Is it normal behavior? If so , how to check if an old OGG patch was applied or not?

Thanks,

Iris