using the same code to receive and send files again and again leads to croweded error

Traceback (most recent call last): File "wormhole\cli\cli.py", line 143, in _dispatch_command

File "twisted\internet\defer.py", line 1853, in _inlineCallbacks

File "twisted\python\failure.py", line 467, in throwExceptionIntoGenerator

File "wormhole\cli\cmd_receive.py", line 120, in go

File "twisted\internet\defer.py", line 1853, in _inlineCallbacks

File "twisted\python\failure.py", line 467, in throwExceptionIntoGenerator

File "wormhole\cli\cmd_receive.py", line 142, in _go

wormhole.errors.ServerError: crowded ERROR: crowded

how to fix this

i am using a loop to send files (as it drops connection frecquently) and have my own relay for transit but