(Updated) DAVENPORT, Iowa (AP) — Hundreds of Iowa National Guard soldiers have been told they were overpaid after a year-long deployment in the Middle East and must make immediate plans to repay the money. The Quad-City Times reports that about 366 soldiers with the 248th Aviation Support Battalion were informed of the issue shortly after returning from Kuwait and Iraq. Lt. Col. Michael Wunn is a spokesman for the Iowa National Guard. He says the overpayments range from $2 to $4,500. He says soldiers have been given multiple options to repay the funds, and many have already taken steps to do so.

Soldiers can write a check to repay their debts, have the Army keep all of their monthly checks until they’re paid off, or have monthly or weekly payments deducted from their pay. “We understand this creates a hardship for those affected,” Wunn said, noting that soldiers don’t have to repay the full amount by the end of the year. Wunn says the problem seems to originate from an issue at the demobilization station at Fort Hood in Texas. He says some battalion members continued receiving active duty pay or entitlements after their active duty ended.

Democratic U.S. Rep. Dave Loebsack said it’s unacceptable that a payroll error could cause soldiers financial hardship. “The Army must work with each individual soldier to ensure that they do not face any financial harm or difficulty,” he said. “I encourage any service member in Iowa who was affected by this failure at the Department of Defense to reach out to my office if you are in need of assistance.”