Ok so some days i do great on bass play anything make great things up etc etc then some days i do horribly cant play anything or do anything

anyone know why or a solution?

i dont know why it happens but w/e?
everyone is like that to some degree. if i get hit by the muse, ill drop everything im doing to go practice for an hour or so. if im not in the mood at all, ill practice the more technical aspects like reviewing theory or playing scales in a couple different techniques.
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