How to avoid PO error due to Order Amount Difference between Lines and Distributions?

Summary:

When Manage Approvals in the PO is clicked or PO is submitted, the order gives an error. The error message is "The approval history can't be displayed because this task couldn't be assigned to any approver."

Ruleset for the order is available under Manage Purchasing Document Approval, but the rules don't return any result. Since there is no issue with the rulesets, we investigated this issue. Cause of the error is due to the split amount in distribution lines. If there is a discrepancy between the Ordered Amount in the lines and distributions, the order gives this error and blocks you to submit it.