It’s important that anyone using FileMaker 19 update to the latest version 19.5.3 ASAP to avoid a possible issue that has been fixed in this latest release.
From the Help menu in FileMaker, choose Check for Updates… and then download the 19.5.3 update.
In certain circumstances, using the older version of FileMaker and selecting the wrong options could corrupt your database in a way that may or may not be recoverable. For more details, read this article.
Regular database backups are critical to recovering your data if something like this were ever to happen to your FileMaker solution. If you are not sure if your server is sufficient or your backups are running properly, contact us and we can help.