Screenshot says it all:

Either these options act as OR or AND, it's silly. The second time that the user tried to re-add the "front page" condition, that option should not have been available.
Making this issue a generic one and not specifically for the front page case, because there might be other cases too.
GitHub Issue #:
1021
Recent comments
@yorkshirepudding, In the end I fixed it by deleting the config/active folder contents, copying the config/staging/ files into config/active, importing the database again and clearing the caches...
Importing the staged config throws an error: another field with the same name already exists
Thanks, I have to go out now, I will try later on and report back
Importing the staged config throws an error: another field with the same name already exists
Hi Francis. Yes, what config do you have in staging for it? You might have configs like: field.field.field_video_embed field.instance.node.page....
Importing the staged config throws an error: another field with the same name already exists