QB Issue Resolution:

This is the exact reason you do not use journal entries for these types of transactions.  Go to vendor>pay bills (use a  current fiscal period date) and click off the check and apply the “credit” created by the journal entry to clear them.

Resolution for Issue 'Remove old bills and journal entry from a closed period' available: Yes (Solved).
Source: Intuit Community forum.

Remove old bills and journal entry from a closed period: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Journal Entry
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Error Recovery for Journal Entry [Canada]
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