This happened on VS 2017 when I tried to update the setting in the profile. The next time I tried to publish, the password was cracked, and this started to prompt me.
I realized that deleting a profile from the Public User Interface in VS did not work, because all it does is remove .Pubxml from the project without removing it from the HD and Source controls. In addition, if you do not delete the file manually, import a parameter that will leave you hanging; literally.
Again, the solution is to delete the file manually (both from HD and from the control source). Then importing it worked like a charm.
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