What does the account status of Multiple occurred in cost transactions details mean?

Summary

During doing month end closure of June in 19B, why is the multiple displayed in the account status of some transactions in cost transactions details.

Content

During doing month end closure of June in 19B, why is the "multiple" displayed in the account status of some transactions in cost transactions details. It is a first time to find out this Multiple account status, so we should know what does it mean and what does it affect and What is the next action?

Version

19B