I think it is pretty common to go from a dry fast into a water fast. The other way around (water to dry) is considered a bit riskier. The idea is you will lose electrolytes during a water fast so you may not have enough to feel optimal during a dry fast. If your electrolytes are too low it can be dangerous.
Can you replenish electrolytes before going into a dry fast? Probably, but I don’t know for sure. Maybe somebody else who knows more can share.