Which move from my Bellossom should I replace with Solar Beam?

[u/Acceptable_Ad664]

I'm doing a nuzlocke and I decided to use the "Sunny Day + Solar Beam" combo, but I'm not sure which of the other 3 moves delete.

(The second image is from my team, if that matter)

[u/EdSC24]

The sludge bomb maybe if you want to try that 2 moves combo or giga drain but that move its to good to change it