Is there a way to swap webform object between nodes?
Simply swapping Node IDs in {webform} table does not help, but switching them in {webform_component} is.

The way I did it was to swap nids in following tables:


{webform}
{webform_component}
{webform_emails}


I didn't touch submission tables because I was planning to purge them anyway, but for test purposes I needed to swap:


{webform_submissions}
{webform_submitted_data}


That did it. Don't know if it is really enough, but I see no errors after a long time of use.