Can anyone help me how to edit, eng units with same content :-µmol_mol⁻¹. I getting eng units like µmol_mol?1 in data archive. Can anyone suggest how can we edit that?

I'm not sure if it possible since the ⁻ is a Unicode superscript minus and not part of ASCII. Perhaps the follwing works: _mol¯¹

See this page for details on the supported characters see this kb article: https://customers.osisoft.com/s/knowledgearticle?knowledgeArticleUrl=KB00454