diff --git a/webservice/webservice.py b/webservice/webservice.py
index 1e73f38a35d97f58a39810403d63137e9303a2fa..92053ecdae56f9cef42b83f27b9ff91665e746e8 100644
--- a/webservice/webservice.py
+++ b/webservice/webservice.py
@@ -749,7 +749,7 @@ async def server_runner(config, mode):
                     proposal = "{:06d}".format(int(proposal))
 
                     logging.info(f'{action} of {proposal} run {wait_runs} at '
-                                 '{instrument} is requested. Checking files.')
+                                 f'{instrument} is requested. Checking files.')
 
                     # Read calibration configuration from yaml
                     conf_file = Path(config['config-repo']['local-path'],
@@ -947,7 +947,7 @@ async def server_runner(config, mode):
                 thisconf['in-folder'] = in_folder
                 thisconf['out-folder'] = out_folder
                 thisconf['karabo-id'] = karabo_id
-                thisconf['karabo-da'] = ','.join(karabo_das)
+                thisconf['karabo-da'] = karabo_das
                 thisconf['operation-mode'] = operation_mode
 
                 thisconf.update(runs_dict)