one column in onetable is insert into another table in mysql query

one column in onetable is insert into another table in mysql query
 
update Fileversions
set Fileversions.filename = (select Filedata.filename
from Filedata
where Fileversions.file_id=Filedata.file_id)
where exists (select 1
from Filedata
where Fileversions.file_id=Filedata.file_id) 
 

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