Which preposition should I use in the sentense like the following?

I changed isolation level ... A to B.

Is should be OUT or FROM?

I changed isolation level out A to B.

I changed isolation level from A to B.

Which option is correct?


From would be the most accurate.

Out implies removal, whereas From implies a change of state (from A to B).

You're also missing a the in front of isolation. A better sentence could be:

I changed the isolation level from A to B.

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