KELSO, Wash. – Proof reading is apparently not a strong suit of administrators at Kelso High School.

The Washington school’s graduation ceremony was underway when someone discovered the diploma covers had the wrong state seal on them.

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“State of Oregon – 1859” the royal blue covers read.

Kelso superintendent Glenn Gelbrich says the mistake was due to “an error in the order” which was not discovered until after it was too late, Q 13 Fox reports.

According to Fox 12 Oregon, the diplomas are still valid and graduates will receive new covers with the Washington state seal “soon.”

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