This tool allow you to either cancel all your listings, or migrate your listings, between marketplace contracts. All swaps will be identical (same number of editions and same price).
If you want to reswap your own artworks at a different price, you must use the "Manage swaps" tool.
The tool send operation in batch of maximum 30 reswap/cancel, until no more swaps need to be migrated. Each time, you will have to approve the new batch transaction in your wallet.