The Puerto Rico Oversight Board filed an objection to invalidate $6.2 billion in general obligation bonds issued since the start of 2012, saying it it exceeded a territorial constitutional debt limit.

The board filed its objection late on Monday in the Title III case, challenging the validity of the 2012A, 2012B, and 2014 GO bonds. “The objection asserts that the invalid debt was issued in clear violation of the Puerto Rico constitution and should be declared null and void,” the board said in a press statement.