iOS Question issue with this Select a different signing certificate for CODE_SIGN_IDENTITY, a team that matches y

I am suddenly getting this issue

error: No certificate for team 'D42N54EC4S' matching 'iPhone Developer: Chris collinge (6D9KEQS274)' found: Select a different signing certificate for CODE_SIGN_IDENTITY, a team that matches your selected certificate, or switch to automatic provisioning. (in target 'B4iProject')