metasploit installation error

Hello, I am having trouble installing metasploit after on my rasberry pi. after i used chmod and curl to create the installer i run ./msfinstall. at first it seems to be installing fine but then i get this error message(' Failed to fetch http://downloads.metasploit.com/data...ucid/InRelease Unable to find expected entry 'main/binary-armhf/Packages' in Release file (Wrong sources.list entry or malformed file') whats even worse is that now i cant update becuase i keep getting that error message. (i have already tried running rm -rf /var/lib/apt/lists and sudo apt-get update to remove this error but the error is still there). could someone please help me.