QB Issue Resolution:

If what you wish to change is the Account Number in the Accounts Payable information, then, you may change it by,

Go to Lists menu and select Chart of Accounts
Right click on Accounts Payable and choose Edit Account
At the top right corner, go to Number field and edit the information
Hit Save and Close to save the changes

Resolution for Issue 'How can i change the accounts payable account number that is different from the one its using?' available: Yes (Solved).
Source: Intuit Community forum.

How can i change the accounts payable account number that is different from the one its using?: 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 Accounts Payable
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