In the 2018 edition of Koll's PreisKatalog there is a new variant for the 314S - "0" (version 0). Often times when new version is discovered/uncovered that proceeds the first version, Kolls will assign a version "0" or even "01" to this variant rather than disrupt the versioning numeration that has existed for years. In the case of the 314S Kolls has identified a color variant "zitronengelb" (German) or lemon yellow that is different from the yellow color of the V1.
I have not seen an example of this version. Should you have one of these "lemon yellow" versions (or a photo of one) please contribute the image to the Wiki Directory for others to see.