OPatch failed with error code 2

When i check the patch conflict for a patch, got below error.

]$opatch prereq CheckConflictAgainstOHWithDetail -ph ./
Oracle Interim Patch Installer version 12.2.0.1.6
Copyright (c) 2020, Oracle Corporation.  All rights reserved.

PREREQ session

Oracle Home       : /u01/oracle/product/12.2.0.1/dbhome_1
Central Inventory : /u01/oracle/oraInventory
   from           : /u01/oracle/product/12.2.0.1/dbhome_1/oraInst.loc
OPatch version    : 12.2.0.1.6
OUI version       : 12.2.0.1.4
Log file location : /u01oracle/product/12.2.0.1/dbhome_1/cfgtoollogs/opatch/opatch2020-07-11_14-10-25PM_1.log

Invoking prereq "checkconflictagainstohwithdetail"

Prereq "checkConflictAgainstOHWithDetail" is not executed.

The details are:
Unable to create Patch Object.
Exception occured : /u01/oracle/psu/30783641/30886680/etc/config/actions.xml with Version field of the component "delete" in actions file cannot be <null> or empty. Please check patch metadata.

OPatch failed with error code 2

Solution:

its due to OPatch version is not compatible for the patch you are trying to apply. download latest opatch utility from metalink and unzip in ORACLE_HOME location. you can download latest OPatch  here

In my case, Opatch version is 12.2.0.1.6 but in patch read me file mentioned it required 12.2.0.1.19 or later 

after adding new OPatch version issue is resolved.