The article below uses screenshots from an older instance but the same approach will work in the newer UI. We can use Person Management or the Global Search option.
Hired worker in wrong LE
Steps to Cancel Work Relationship
Navigator > Person Management > Search for Person
Select person
Manage Work Relationship
Actions > Cancel Work Relationship
Submit
Yes
OK
Navigator > New Person > Hire an Employee
Enter person details to include correct LE
Next
Select Person > Continue
OK
Next
Complete hire details train > Submit > Yes > OK
Navigator > Person Management > Advanced > Search for Person > One record found
Corrected LE shown