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This message comes up when I save my file:
This file won't be fully useable on TVPaint Animation from version 11.0.0 to 11.0.2. If you decide to save it anyway, please make sure that TVPaint is updated to its last version (>=11.0.3) on the machine the file needs to be opened.
(see screenshot below)


Is it okay to click "Save it (and don't ask again)? Or is a warning that I am doing something wrong?

Thanks
My OS: MacOS Sierra 10.12.6
OS Architecture:
Software: TVPaint 11.0.3 Pro (mac-64
Processor: Xeon E5 6-core 3.5GHz
Memory 64 GB
Wacom Cintiq 27QHDT
Driver: 6.3.1795

Well, it's just as the message says, if you don't ever intend to load it in an older version, just go ahead.
There was a bug in 11.0.0 to 11.0.2 that prevented these versions from loading some files.