DB2 LUW - Is the db2/V11.5 directory needed for V11.5.7.0?

According to db2level, we're currently running DB2 v11.5.7.0 (on RHEL 7.9). It was upgraded from 11.5 before I arrived. This might sound like a stupid question, but are the V11.5 files required for V11.5.7.0, or is V11.5.7.0 fully stand-alone so that I can remove /opt/ibm/db2/V11.5? (I think the answer is "yes", but there's no test system for me to experiment on, and I don't want to break production.) Both V11.5/ and V11.5.7.0 see to be full installations: $ du -cm -d1 /opt/ibm/db2 du: cannot read directory ‘/opt/ibm/db2/V11.5/.licbkup’: Permission denied 2270 /opt/ibm/db2/V11.5 du: cannot read directory ‘/opt/ibm/db2/V11.5.7.0/.licbkup’: Permission denied 2150 /opt/ibm/db2/V11.5.7.0 4420 /opt/ibm/db2 4420 total More details: $ /sbin/lsof -u db2dlp01 | grep V11.5/ $ echo $? 1 $ /sbin/lsof -u db2dlp01 | grep -q V11.5.7.0 $ echo $? 0 $ /opt/ibm/db2/V11.5/bin/db2greg -dump S,DB2,11.5.0.0,/opt/ibm/db2/V11.5,,,0,0,,1610467335,0 V,DB2GPRF,DB2SYSTEM,ewr0vlpudb01dol,/opt/ibm/db2/V11.5, S,TSA,4.1.0.7,/opt/IBM/tsamp,DG_NOT_ALLOWED,DB2_INSTALLED,0,0,-,1651371491,0 S,RSCT,3.2.6.2,/usr/sbin/rsct,DG_NOT_ALLOWED,DB2_INSTALLED,0,0,-,1651371491,0 S,DB2,11.5.7.0,/opt/ibm/db2/V11.5.7.0,,,0,0,,1651371660,0 V,DB2GPRF,DB2SYSTEM,ewr0vlpudb01dol,/opt/ibm/db2/V11.5.7.0, I,DB2,11.5.7.0,db2dlp01,/home/db2dlp01/sqllib,,1,0,/opt/ibm/db2/V11.5.7.0,, $ /opt/ibm/db2/V11.5.7.0/bin/db2greg -dump S,DB2,11.5.0.0,/opt/ibm/db2/V11.5,,,0,0,,1610467335,0 V,DB2GPRF,DB2SYSTEM,ewr0vlpudb01dol,/opt/ibm/db2/V11.5, S,TSA,4.1.0.7,/opt/IBM/tsamp,DG_NOT_ALLOWED,DB2_INSTALLED,0,0,-,1651371491,0 S,RSCT,3.2.6.2,/usr/sbin/rsct,DG_NOT_ALLOWED,DB2_INSTALLED,0,0,-,1651371491,0 S,DB2,11.5.7.0,/opt/ibm/db2/V11.5.7.0,,,0,0,,1651371660,0 V,DB2GPRF,DB2SYSTEM,ewr0vlpudb01dol,/opt/ibm/db2/V11.5.7.0, I,DB2,11.5.7.0,db2dlp01,/home/db2dlp01/sqllib,,1,0,/opt/ibm/db2/V11.5.7.0,, More info: $ /usr/local/bin/db2ls Install Path Level Fix Pack Special Install Number Install Date Installer UID --------------------------------------------------------------------------------------------------------------------- /opt/ibm/db2/V11.5 11.5.0.0 0 Tue Jan 12 11:02:15 2021 EST 0 /opt/ibm/db2/V11.5.7.0 11.5.7.0 0 Sat Apr 30 22:21:00 2022 EDT 0