Thank you for your support.
After that I want to fill the removed clouds with another (same tile number T44NNN).
I followed the path Raster<<Geometric<<Mosaicking
I noticed your answer in Cloud mask - SNAP sentinel 2. I tried to use as expression the following :
IF (scl_cloud_high_proba || scl_cloud_medium_proba || scl_thin_cirrus) THEN $2.B01 ELSE B01
But I couldn’t find $2.B01. I have only B1.
Please guide me to solve this matter. If I need to follow another method to solve my matter please help me.