The simplest explanation is also the most important.
That sequence matters because VAR is built to correct clear errors, not to re-referee every attacking phase. Here, the judgment inside that process appears to have been the problem. The update says the goal should have triggered an on-field review, which tells you the officials did not think the phase crossed that threshold in the moment.
The controversy was not really about technology. It was about interpretation.
That is significant. When officials admit a review should have been recommended, they are effectively saying the process broke at the key checkpoint. The goal was not allowed because the laws were rewritten; it was allowed because the review system failed to stop and reassess the original call.
For City, the win still goes in the table. For United, the frustration is obvious because the admission changes nothing about the scoreline. It also revives a familiar debate: supporters can accept contentious calls, but they struggle far more with inconsistent use of VAR.
The next storyline is straightforward. Attention will turn to how both clubs respond on the pitch, but the wider game will be watching whether officials tighten the review standard after one of the season’s biggest matches was decided by a call they now appear to regret.