What kind of seam has a pink edge?

I have a sub-surfed model with an edge on it that was made sharp, but it’s a pink highlight, rather than the greenish highlight that ‘mark sharp’ gives, and I’m trying to release it but I can’t find a command that seems to work. I’ve tried every kind of clear under the ctrl-e menu and also going through shift-e and giving it a value of zero. What does a pink edge mean and how do I clear it?

Default colour for Edge Crease

Set edge crease value to zero to remove or Shift+E and add -1 to the crease value

The purpose of “finishing” a seam is to prevent raveling and (possibly) to provide additional stability

:confused: You somehow managed to mistake 3D modelling for sewing? how does one even do that??