Bonuses always stack unless they come from two magic items, spells, class features, etc with the same name. (See the DMG errata under "Combining Game Effects".)
Exceptions to the general rules are explicit; if the CHA bonus from Sacred Weapon were supposed to replace the ability modifier you normally use, the text would say so.
Bonuses always stack unless they come from two magic items, spells, class features, etc with the same name. (See the DMG errata under "Combining Game Effects".)
Exceptions to the general rules are explicit; if the CHA bonus from Sacred Weapon were supposed to replace the ability modifier you normally use, the text would say so.
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