Hi @Tut. Thank you for your input.
As per the recommendation of the kind gentle people above, I had already changed the amount to zero, so as much as I would like to share a screenshot, I don’t have anything to show at this point.
However, after having read your comment, I went back to the account and the transaction was still there, pending, but the amount was zero and was still linked to its corresponding purchase invoice.
I then re-entered the amount, updated it, and then re-edit it to delete it again only this time it was successful.
I can’t explain why this happened, but I can safely say that this issue is solved. So this transaction is no longer there, just as it should be.
If this situation repeats itself I will come back to this forum so we can work out why this is happening.
Thank you for giving your time to this issue.