[Koha] Marc File to sort in spanish

I am running Koha 19.11 on Ubuntu 18.04 and Mysql Ver 14.14 Distrib 5.7.31. After upgrade from version Koha 18 to 19 where are having problem to sort our catalog when trying to search a book, capital letter ( *É* , *Á, etc) are not recognize.* *I think the problem was on these files: *sort-string-utf.chr and word-phrase-utf.chr , but now someone told me the error is on a MARC file. Which file? How this file has to be to recognize the correct order in a sort? Thanks at lot. -- *Luis Moisés Rojas P.*