Premiere Creates New .CFA files every time I open the project

i have project contains 2 long (70 min.) clips.  each time open project, premiere conforms audio both clips.  save project, close premiere, open right , starts conforming audio again.

i have tried changing premiere stores audio preview files, no matter do, premiere puts .cfa files wants.

i have 8 versions of same .cfa files - , next time open premiere, i'll have 9.

 

any appreciated!

tell more settings, since can't replicate problems.

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