Delphi xe8, Cannot rename component xxx, component was introduced in an ancestor form -

i going delphi xe 8 tutoial found @ http://docwiki.embarcadero.com/radstudio/xe8/en/tutorial:_using_the_ide_for_delphi_and_c%2b%2bbuilder. problem having i've followed tutorial step step , keep getting error when trying rename actionlist or mainmenu says cannot rename component xxx, component introduced in ancestor form.

i don't know how fix issue , can not delete components have no clue fix it.

in design view locate views: dropdown. select 'master' , able rename components on form.