Funds Error

Hi, I created a PO that directly affects the budget of a project. I typed a wrong supplier so I had to cancel the PO, I did the following:

Created a new PO by copying the wrong document and changing the supplier, then I canceled the wrong PO and finally I tried to approve the new PO, but this new PO got funds error (it is failing 'cause it has insufficient funds), I do not why, because I canceled the wrong document so this action relesead funds, and then I tried to aprove the new one (same amount than the wrong document) but Projects is failing the check funds.