I have a hot tub currently wired at my home in the following configuration:

50amp breaker at the main panel to
50 amp GFCI breaker mounted outside, on the house near tub to
Spa main panel inside tub which has a 110v GFCI module.

My issue is that sometimes when I kick on the heater while the pump is running, the 110 module will trip. But not always though.

The question is, can I eliminate this 110v module because I'm ground fault protected by the 220v GFCI breaker mounted on the house? Is that accurate?

Thanks for your help.

I SERIOUSLY doubt it.

That is also not likely a "120v" GFI module. It is most likely a faceless GFI with a current transformer behind it. They are typically used in 240v applications.

The ONLY one who can accurately answer this is the spa manufacturer.