Erratum: Propionamide (C₂H₅CONH₂): The Largest Peptide-like Molecule in Space (ApJ (2021) 919 (4) DOI: 10.3847/1538-4357/ac091c)

1. Motivation This erratum corrects the value of the vibrational partition function of propionamide in the published article, where we made a mistake in the values of the vibrational partition function of propionamide. 2. Modification We would like to present the corrected values of the vibrational partition function in Table 2. The vibrational partition functions given in Table 2 of the published article are from another isotopic species. The revised partition functions show minor differences with respect to the published ones. The column density of propionamide was estimated by visual matching in Weeds. We did not change the value as the change of partition function is small. See Figure 5 for clean lines, and Figure 7 for partially blended v = 1 lines of propionamide, with synthetic spectra with updated partition functions overlayed. We could see from these two figures that the change of synthetic spectra with updated partition functions is negligible in comparison with Figure 5 and Figure 7 in the published article, and the synthetic spectra are still consistent with the observed lines. {figure presented}, {table presented},{figure presented} 3. Conclusion The revised partition functions show minor differences with respect to the published ones. The overall conclusions in the published article remain unaltered.