6.2 fatal error invalid child index

I am using LibreOffice 6.2.8.2 on Mac OS X El Capitan 10.11.6. Often while I’m working on a document in Calc the program closes and appears the message “6.2 fatal error invalid child index” What can I do? Thank you for helping

Maybe your file it’s broken… if your not have private data, you can attach it for we review.

May be you are hit by #tdf124948. Check the bug report for steps to reproduce (Description and Comment 9)