Autoload error

Theme 'frontend/Pearl/weltpixel_custom' from '/var/www/vhosts/proswimwear.co.uk/build/live-213/app/design/frontend/Pearl/weltpixel_custom2' has been already defined in '/var/www/vhosts/proswimwear.co.uk/build/live-213/app/design/frontend/Pearl/weltpixel_custom'.