TITLE: GCN CIRCULAR NUMBER: 29111 SUBJECT: correction to GCN 29110 - Fermi GBM Sub-Threshold Detection of GRB 201221A DATE: 20/12/21 23:14:59 GMT FROM: Peter Veres at UAH P. Veres (UAH) reports: In GCN 29110 we reported the sub-threshold detection of GRB 201221A. The reported fluence value contained an error. The corrected paragraph reads: " The event fluence (10-1000 keV) in the T0-10 s to T0+47 s time interval (T0 is the Swift trigger time) is (3.6 +/- 0.4)E-06 erg/cm^2. Using the redshift z=5.7 reported by Malesani et al (GCN 29100), we derive an isotropic equivalent energy in the 1-10,000 keV range of (2.2 +/- 0.2)E+53 erg. " We apologize for the confusion this may have caused.