Issue:-

Below Oracle Homes are already registered in the inventory:
/EBS_Data2/oracle/TEST/fs2/FMW_Home/Oracle_EBS-app1
/EBS_Data2/oracle/TEST/fs2/FMW_Home/webtier
/EBS_Data2/oracle/TEST/fs2/FMW_Home/oracle_common

Exiting Cloning...

Ensure that the above Oracle Homes are unregistered from the inventory "/EBS_Data2/oracle/TEST/oraInventory/ContentsXML/inventory.xml" and re-run adcfgclone.pl script

Solution:-

[oracle@indiandba ~]$ cd $FMW_HOME

[oracle@indiandba FMW_Home]$ ./oracle_common/oui/bin/detachHome.sh ORACLE_HOME=/EBS_Data2/oracle/TEST/fs2/FMW_Home/Oracle_EBS-app1
Starting Oracle Universal Installer...

Checking swap space: must be greater than 500 MB.   Actual 20477 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
The inventory is located at /EBS_Data2/oracle/TEST/oraInventory
'DetachHome' was successful.

[oracle@indiandba FMW_Home]$ ./webtier/oui/bin/detachHome.sh ORACLE_HOME=/EBS_Data2/oracle/TEST/fs2/FMW_Home/webtier
Starting Oracle Universal Installer...

Checking swap space: must be greater than 500 MB.   Actual 20477 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
The inventory is located at /EBS_Data2/oracle/TEST/oraInventory
'DetachHome' was successful.

[oracle@indiandba FMW_Home]$ ./oracle_common/oui/bin/detachHome.sh ORACLE_HOME=/EBS_Data2/oracle/TEST/fs2/FMW_Home/oracle_common
Starting Oracle Universal Installer...

Checking swap space: must be greater than 500 MB.   Actual 20477 MB    Passed
The inventory pointer is located at /etc/oraInst.loc
The inventory is located at /EBS_Data2/oracle/TEST/oraInventory
'DetachHome' was successful.