The user has deleted a universal/relational clause item in their specification and wishes to bring it back in.
Every System from the Resources panel has either a default universal clause item (i.e. Description) or a relational clause item (i.e. System performance, Execution, System completion or System facility management) which are highlighted in green.
These clause items work differently to standard clause items as you can specify specific clause types such as Performance or Execution clauses from their relevant drop down clause items.
If the user has deleted these special clause items, there is a way to bring them back in. You need to right click on the System title in the editor window and highlight Clause Items - this will then bring up a list of the available universal/relational clause items that either have been deleted or can be inserted into the specification: