The extent of the northeastern part of the Swarzewo palaeomoraine in the Mid-Holocene during the Atlantic period, approximately 8 ka b2k, 
${f_{20}}\left( x \right)dx$, [
${R^2} = 1$], 
${f_{21}}\left( x \right)dx$, [
${R^2} = 0.87$], 
${f_{22}}\left( x \right)dx$, [
${R^2} = 0.89$], dynamics coefficient 
${C_{mid - H \to b2k}} = 0.17\, \pm \,0.020\,m/yr$ and 
${R^2}$ statistics were calculated in the Desmos environment. The Desmos button contains a hyperlink to the map in Desmos [https://www.desmos.com/calculator/q8vgshkzt5?lang=en] environment, with unlocked polynomial nodes allowing for manual modelling.
There is an error in Figure 8 of Frydel (Reference Frydel2024), where 
${{\text{A}}_{{\text{mid}} - {\text{H}} \to {\text{b}}2{\text{k }}}}$ parameter in Sector J2 should read 
$\smallint\!{f_{21}}\left( x \right)dx - \smallint\!{f_{22}}\left( x \right)dx\,$ instead of 
$\smallint\!{f_{21}}\left( x \right)dx - \smallint\!{f_{20}}\left( x \right)dx$. To be precise, this is only a typo in the Figure 8 description while the relevant functions 
$\smallint\!{f_{21}}\left( x \right)dx - \smallint\!{f_{22}}\left( x \right)dx$ were used to determine the 
${{\text{A}}_{{\text{mid}} - {\text{H}} \to {\text{b}}2{\text{k }}}}$ value.
Therefore, this typo in the Figure 8 description does not affect the Swarzewo Moraine recession geodynamics since the Mid-Holocene 
${{\text{C}}_{{\text{mid}} - {\text{H}} \to {\text{b}}2{\text{k }}}}\left( {S1} \right) = { }0.17 \pm 0.020{\text{ m}}/{\text{yr}}$ in any way, but requires correction to properly represent the calculation mechanism of the 4F MODEL framework within Desmos (https://www.desmos.com/calculator/q8vgshkzt5?lang=en) environment.
The correct Figure 8 is reproduced here.
