PR Approver name not showing and automatically approved

PR IS APPROVED AUTOMATICALLY AND APPROVER NAME IS NOT SHOWING

In PR valuations, the amount is 0. Approver name is not showing, and PR is auto approved.

And status changed to Release Completed.

Refer to the screenshot, change the gross price from 0 to 1, and save the PR.

After the save, the PR workflow is triggered, and the approver name is shown.