If you are seriously interested in BeeBase you'll be spending hours learning the basics of the Lisp-dialect and GUI toolkit, getting a hangup on that error message means you don't have that kind of interest. Maybe the empathy got in the way of that, I don't know.
And let's say someone makes a patch that implements a new error message that specifies which of the two rules regarding table names has been breached, then what? More complaints about the next quirk? Some other error message? Begging for a Lua-implemented query language because parens lost the syntax wars of yesteryear, describing it as miserable that it isn't already integrated?