I am using Sourcetree for my Git repo, which exists in Gitlab. I am creating merge requests on Gitlab’s website when I want to merge to development. Once it is merged to dev, I want to delete the feature branch, but I get a message in Sourcetree saying that it hasn’t been merged yet. I need to select the force delete option every time to actually delete it.

git -c diff.mnemonicprefix=false -c core.quotepath=false --no-optional-locks branch -d <feature branch>
error: the branch <feature branch> is not fully merged
hint: If you are sure you want to delete it, run 'git branch -D <feature branch>'
hint: Disable this message with "git config advice.forceDeleteBranch false"

Is there a way I can have Sourcetree recognize that it was merged to dev through Gitlab?