Configuration Error

There is an error in the configuration for this view: Type: ComposerError() Message: found duplicate anchor 'doctype'; first occurence in "", line 150, column 14: doctype: &doctype ^ second occurence in "", line 2254, column 14: doctype: &doctype ^ 148 149 #html5 doctype 150 doctype: &doctype 151 value: '<!doctype html>' 152 153 # base tag template Stacktrace: