As of Ash Wednesday, the word “one” is to be omitted from the conclusion of the Collect, and likewise of similar prayers in the liturgy. Instead of ending “one God, for ever and ever,” the Collect will now end “God, for ever and ever.”
The reason for the change, as requested by the Holy See, it is to avoid misunderstandings about the identity of the Son within the Blessed Trinity, or even the misconception that Our Lord Jesus Christ is “one God” among others.
The English version will now be consistent with the Latin text, as well as conform to translations into other languages including French.