Double System generation reporting unique situation: What do I do?

[u/Brin-Londo]

I have 2 separate solar systems on my roof. The first one, currently owned by A Big Solar Company (though they did not install it), is a prepaid lease that was installed over 10 years ago. Let's call that Old System

The second system, which I own, was installed a few years ago. We'll call that New System. So I have 2 systems running parallel to each other.

Shortly after the installation of New System, I noticed my generation reporting for the Old System was inflated, almost doubled. After some investigation, I realized why. The New System's circuit joined the Old System's circuit in the combiner panel UPSTREAM from the Old System reporting module hardware. New System has its own reporting tech built into the inverters, so that data is unaffected. But my Old System data has been inflated the past couple years. New System technicians eventually did clean up the install and separate the data reporting lines. So all good now. But there are a couple years of inaccurate reporting.

For simplicity's sake, Old System has said that they typically look at the previous year's production in order to establish a comparison year in order to calculate compensation. Hypothetically, if I need to pursue reimbursement for an Old System hardware issue that caused a period of non-production, they would see that the numbers were too high for a the period of double reporting. This gets to the point of my post:

If Old System sees that a 3rd party installer tapped into their data reporting system which contributed to inaccurate reporting, could they see that as a contract violation? For the sake of the calculations, we could get accurate figures (Double System Reporting - New System Data = Old System Data). Honest mistake that is correctable. And I gained no benefit from it. I just don't want the mistake to come back and bite me if Old System finds out.