Error processing queries with equal sign

[cyanide-burnout]

local result = connection:execute(
"SELECT Users.ID, Users.Repeater, Users.Slot, Repeaters.Network " ..
"FROM Users JOIN Repeaters ON Repeaters.ID = Users.Repeater")

/usr/share/tarantool/mysql/init.lua:72: attempt to compare 'number' with 'struct tuple'