does adding a line to a bill break the link from a PO

AI generated answer (using internal Slack threads):

Based on the conversations, adding a line to a bill does not necessarily break the link from a Purchase Order (PO). However, modifying the item or expense category in the bill can break the existing link. If the link is broken, there is no way of getting it back unless the bill is not paid and open, in which case it can be deleted and recreated from the PO. It's also mentioned that standalone bills/invoices cannot be linked to an existing PO unless the bill is generated directly from the PO. Some users have created workarounds such as adding a custom field to the transaction to manually select the corresponding PO as the value, but this is not a proper reference as it doesn't apply to related records. In some cases, changing the vendor on the PO and then changing it back can break the link between the bill and the PO. However, this method is generally discouraged. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******