After starting service desk on both primary and secondary following error message pops up. " cannot continue with mismatched checksums. What could be the reason for this error message to occur?

Document ID : KB000053974
Last Modified Date : 14/02/2018
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Description:

This error occurs if customizations are different on primary and secondary servers.

Solution:

Following error message occurs when the services are recycled on both the primary and secondary (see Figure 1):

Figure 1:

Figure 1

This occurs when customizations on both the machines mismatch. Please ensure that the site/mods on both the machines are at sync.
To ensure if the files and folders are same, we may use Windiff tool to compare the directory structure and files.