GRB 210919A: Lowell Discovery Telescope upper limits (correction to GCN 30859)

We observed the field of the short GRB 210919A (Tohuvavohu et al., GCN Circ. 30846) using the Large Monolithic Imager (LMI) on the 4.3m Lowell Discovery Telescope (LDT) at Happy Jack, AZ. Observations started on September 21, 11:27:43 UT (2.46 days after the Swift trigger) taking 5 exposures of 200 s each with SDSS r filter. Observations were taken at an airmass of about 1.27 and seeing of about 1.5". We do not find any source inside the enhanced XRT position (Goad et al., GCN Circ. 30850) down to a 3-sigma limiting magnitude of r>23.6 AB mag. Magnitudes are calibrated against the SDSS catalog and not corrected for Galactic extinction. We thank the staff of the Lowell Discovery Telescope for assistance with these observations.