Is the Torah reader required to read the correct portion on Chanukah in the following or similar circumstance?
It is the second day of Chanukah. The reader correctly reads the Cohen's portion starting with
יח) בַּיּוֹם, הַשֵּׁנִי, הִקְרִיב, נְתַנְאֵל בֶּן-צוּעָר--נְשִׂיא, יִשָּׂשכָר)
When he comes to read the Levi's portion, instead of reading
כא) פַּר אֶחָד בֶּן-בָּקָר, אַיִל אֶחָד כֶּבֶשׂ-אֶחָד בֶּן-שְׁנָתוֹ--לְעֹלָה).
and on to the end of the parsha, he starts reading the equivalent possukim for the next day,
כז) פַּר אֶחָד בֶּן-בָּקָר, אַיִל אֶחָד כֶּבֶשׂ-אֶחָד בֶּן-שְׁנָתוֹ--לְעֹלָה)
and then corrects himself before the end and ends up with the correct nosi.
He has read one or two wrong pessukim, but the words were right. Does he have to repeat by reading the right words or is this a case of טרחה דצבורה - inconvenience to the community and it is not necessary to repeat?