  A prototype cryomodule containing eight Single Spoke Resonators type-1 (SSR1)
operating at 325 MHz and four superconducting focusing lenses was successfully
assembled, cold tested, and accelerated beam in the framework of the PIP-II
project at Fermilab. The impact of induced residual magnetic fields from the
solenoids on performance of cavities is presented in this contribution. In
addition, design optimizations for the production cryomodules as a result of
this impact are highlighted.
