[Dixielandjazz] Collision at the bridge

[Ken Gates]

"Dream a Little Dream of Me" is a lovely song from 193x.
Last night at a small jam session sixteen bars went nicely
until the bridge was met with a Db chord from one source
and with a D chord from another (starting with the key of F).
No time for debate---the next tune was called quickly.

Wondering what the preference is from listmates.
And it is just a matter of preference, or is there a "correct"
key change?

Ken Gates