I see that Psalm 27 is said twice daily. But the tefillot during which it is said differ

• Nusach Ashkenaz says Psalm 27 during ma'ariv while Nusach Sefard does not.
• Both Nusach Ashkenaz and Sefard say it during Shacharit.
• Nusach Sefard says it during Mincha while Nusach Ashkenaz does not.

Let's say someone who usually davens Nusach Ashkenaz entered a Nusach Sefard shul for mincha. He has already fulfilled his twice daily recitation. Does he need to say it a third time during Mincha just because he is now in a Nusach Sefard shul?

I see that Psalm 27 is said twice daily. But the tefillot during which it is said differ:

• Nusach Ashkenaz says Psalm 27 during Ma'ariv while Nusach Sefard does not.
• Both Nusach Ashkenaz and Sefard say it during Shacharit.
• Nusach Sefard says it during Mincha while Nusach Ashkenaz does not.

Let's say someone who usually davens Nusach Ashkenaz entered a Nusach Sefard shul for Mincha. He has already fulfilled his twice daily recitation. Does he need to say it a third time during Mincha just because he is now in a Nusach Sefard shul?

I see that Psalm 27 is said twice daily. But the tefillot during which it is said differ

• Nusach Ashkenaz says Psalm 27 during ma'ariv while Nusach Sefard does not.
• Both Nusach Ashkenaz and Sefard say it during Shacharit.
• Nusach Sefard says it during Mincha while Nusach Ashkenaz does not.

Let's say someone who usually davens Nusach Ashkenaz entered a Nusach Sefard shul for mincha. He has already fulfilled his twice daily recitation. Does he need to say it a third time during Mincha just because he is now in a Nusach Sefard shul?

Note: - Thanks to DoubleAA pointing out that Ma'ariv begins a new day. I have edited this question as a result. Those new to this question may find some of the old comments irrelevant.

I see that Psalm 27 is said twice daily. But the tefillot during which it is said differ

• Nusach Ashkenaz says Psalm 27 during ma'ariv while Nusach Sefard does not.
• Both Nusach Ashkenaz and Sefard say it during Shacharit.
• Nusach Sefard says it during Mincha while Nusach Ashkenaz does not.

Let's say someone who usually davens Nusach Ashkenaz entered a Nusach Sefard shul for mincha. He has already fulfilled his twice daily recitation. Does he need to say it a third time during Mincha just because he is now in a Nusach Sefard shul?