Pentax Super ME autoshooting while winding

I have this Pentax Super ME which was working fine during the summer. I left it sitting for a while and now when I tried to reuse it it made this strange thing. It auto shoot while winding. Do I really need to tear it all apart to fix it? I don't have (yet) the proper tool to unlock the upper part so it's kinda bothering me how to proceed. I spend all the morning looking on YT some videos about this model, I even found the repairing manual and tried to understand which part of the mechanism was the issue but I can't understand it. Any help would be very very appreciated!