Let's say something like this is being returned when attempting to use the imcl (Installation Manager command line tool) command line tool.

ERROR: The Installation Manager's registry information is inconsistent with its installation information.
  ERROR: The registry information at "/home/john.doe/etc/.ibm/registry/InstallationManager.dat" indicates that Installation Manager 1.9.2.2 (internal version: 1.9.2002.20220323_1321) is installed at location "/opt/WebSphere/InstallationManager/eclipse" and is using "/home/john.doe/var/ibm/InstallationManager" for its data location. 
  However, the information at the data location indicates that Installation Manager 1.9.1 (internal version: 1.9.1000.20191001_1228) is installed at location "/opt/WebSphere/InstallationManager/eclipse".

Notice in this example that the error message references /home/john.doe/etc/.ibm/registry/InstallationManager.dat. Ensure this file exists and is owned by the user (john.doe in this example) with -rw-r--r-- permissions (0644).

~]$ ll /home/john.doe/etc/.ibm/registry/
-rw-r--r-- 1 john.doe john.doe 276 Jul 15 03:30 InstallationManager.dat

Examine the contents of the /home/john.doe/etc/.ibm/registry/InstallationManager.dat file. Notice in this example that version is 1.9.2.2 and internalVersion is 1.9.2002.20220323_1321. However, the error message references version 1.9.1 and internalVersion 1.9.1000.20191001_1228.

~]$ cat /home/john.doe/etc/.ibm/registry/InstallationManager.dat 
#Fri Jul 15 03:30:28 CDT 2022
version=1.9.2.2
location=/opt/WebSphere/InstallationManager
internalVersion=1.9.2002.20220323_1321
registryVersion=1
is64bit=true
appDataLocation=/home/john.doe/var/ibm/InstallationManager
launcher=/opt/WebSphere/InstallationManager/eclipse/IBMIM

In this scenario, you could try to update the InstallationManager.dat file to have version 1.9.1 and internalVersion 1.9.1000.20191001_1228 and then reissue the imcl (Installation Manager command line tool) command line tool to see if this resolves the error.

~]$ cat /home/john.doe/etc/.ibm/registry/InstallationManager.dat 
#Fri Jul 15 03:30:28 CDT 2022
version=1.9.1
location=/opt/WebSphere/InstallationManager
internalVersion=1.9.1000.20191001_1228
registryVersion=1
is64bit=true
appDataLocation=/home/john.doe/var/ibm/InstallationManager
launcher=/opt/WebSphere/InstallationManager/eclipse/IBMIM