User has a phased invoice showing percent complete as 105% for one of the phases. This phase has some non-extra expense entries associated with it.
This can happen if the total amount from billable non-extra time and expenses that you have billed on the phase becomes higher than the contract amount for the phase. To prevent this, you should impose a stricter contract amount limit by adding the project rule Prevent time and expense entry after reaching contract amount for the phase. Check out this article for more: Net Bill is higher than contract amount for fixed projects.