The purpose of the current study is to evaluate the efficacy and safety of [177Lu]Lu-DOTA-TATE plus octreotide long-acting release (LAR) versus octreotide LAR alone in newly diagnosed patients with somatostatin receptor positive (SSTR+), well differentiated Grade1 and Grade 2 (G1 and G2) (Ki-67 <10%) advanced gastroenteropancreatic neuroendocrine tumors (GEP-NETs) with high disease burden