...The modern designation Shoshenq III refers to King Usermaatre Setepnamun Shoshenq Sibaste Meryamun Netjerheqaon,[4] who reigned for about four decades, c. 841–c. 803/799 BC [5] or c. 831–c. 791/788 BC.[6] His highest attested regnal year is Year 39.[7] Although he apparently retained control of Tanis and, for the most part, of Bubastis and Memphis, for most of his long reign, Shoshenq III had to reckon with rival kings in parts of the country.[8]
...Recent scholarship has corrected a number of earlier assumptions about the reign of Shoshenq III Sibaste. He was long thought to be the successor of Takelot II Siese and predecessor of Pami I Sibaste, and to have reigned for 52 years on the basis of the burial of a 26-year-old Apis Bull, installed in Year 28 of Shoshenq III, in Year 2 of Pami I.[13] It is now recognized that an additional king, designated Shoshenq IV, Hedjkheperre Setepenre Shoshenq Sibaste Meryamun Netjerheqaon, reigned between Shoshenq III and Pami for at least a decade, and that Shoshenq III and Shoshenq IV reigned for 52 years altogether.[14] Further, most Egyptologists now agree that Takelot II Siese did not intervene as king between Osorkon II Sibaste and Shoshenq III, but reigned as a rival or regional king, apparently somewhere in Upper Egypt, from the last years of Osorkon II Sibaste until Year 22 of Shoshenq III; therefore, Shoshenq III Sibaste was the direct successor of Osorkon II Sibaste.Shoshenq III | Wikipedia
Surprising. If anyone was going to steal someone else's tomb, I would assume it would be Sir Takelot.