rsync task configuration corrupted

Unable to read or edit rsync tasks because of a corruption during previus edit:

Error: Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 137, in call_method
result = await self.middleware._call(message['method'], serviceobj, methodobj, params, app=self,
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1195, in _call
return await methodobj(*prepared_call.args)
File "/usr/local/lib/python3.8/site-packages/middlewared/schema.py", line 973, in nf
return await f(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/middlewared/service.py", line 452, in query
result = await self.middleware.call(
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1238, in call
return await self._call(
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1195, in _call
return await methodobj(*prepared_call.args)
File "/usr/local/lib/python3.8/site-packages/middlewared/schema.py", line 973, in nf
return await f(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/datastore/read.py", line 163, in query
result = await self._queryset_serialize(
File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/datastore/read.py", line 213, in _queryset_serialize
result.append(await self._serialize(
File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/datastore/read.py", line 229, in _serialize
data = await self.middleware.call(extend, data, extend_context_value)
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1238, in call
return await self._call(
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1195, in _call
return await methodobj(*prepared_call.args)
File "/usr/local/lib/python3.8/site-packages/middlewared/service.py", line 618, in sharing_task_extend
data = await self.middleware.call(self._config.datastore_extend, *args)
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1238, in call
return await self._call(
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1195, in _call
return await methodobj(*prepared_call.args)
File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/rsync.py", line 299, in rsync_task_extend
data['extra'] = shlex.split(data['extra'].replace('"', r'"\"').replace("'", r'"\"'))
File "/usr/local/lib/python3.8/shlex.py", line 311, in split
return list(lex)
File "/usr/local/lib/python3.8/shlex.py", line 300, in _next_
token = self.get_token()
File "/usr/local/lib/python3.8/shlex.py", line 109, in get_token
raw = self.read_token()
File "/usr/local/lib/python3.8/shlex.py", line 191, in read_token
raise ValueError("No closing quotation")
ValueError: No closing quotation