RecruitingPhase 1Biological interventionBAFF CAR-T Cells (LMY-920) for Systemic Lupus ErythematosusThis phase 1 study seeks to examine the safety and recommended phase 2 dose (RP2D) of BAFF-ligand CAR-T cells (LMY-920) in adult patients with refractory systemic lupus erythematosus (SLE). It is hypothesized that BAFF CAR-T cells will be safe and will improve SLE disease activity scores.