When the same field is maintained in two systems, they drift. We decide which one is authoritative and keep the other in step with it.
Rates, fees and owner splits get updated in one place and meant to be updated in the other. Nobody owns keeping them aligned because it is not really anyone's job, so the drift is discovered by an owner reading a statement rather than by the team. Correcting it means finding every downstream use of the wrong value, which is far more work than the original update.
We agree which system owns each shared field, then build the sync that keeps the rest aligned to it. Updates propagate on a schedule you set, with a log of what changed and when. The alignment stops depending on anyone remembering, and when a value does change there is a record showing where it came from and when it took effect.
10 properties. 4 countries. 11 hours of manual entry gone from the monthly cycle.
Month-end dropped from days to around 40 minutes. Delivered in four weeks.
If you have ever corrected the same value in two places in one week, this is the fix for it.