diff --git a/apps/files_versions/src/utils/versions.ts b/apps/files_versions/src/utils/versions.ts
index 47943b1590102..77995e85d7677 100644
--- a/apps/files_versions/src/utils/versions.ts
+++ b/apps/files_versions/src/utils/versions.ts
@@ -98,9 +98,11 @@ export async function restoreVersion(version: Version) {
  */
 function formatVersion(version: Required<FileStat>, node: INode): Version {
 	const mtime = Date.parse(version.lastmod)
+	// server timestamps are seconds-based, we have to nullify the milliseconds
+	const nodeNormalizedMtime = Math.floor((node.mtime?.getTime() ?? 0) / 1000) * 1000
 
 	let previewUrl: string
-	if (mtime === node.mtime?.getTime()) { // Version is the current one
+	if (mtime === nodeNormalizedMtime) { // Version is the current one
 		previewUrl = generateUrl('/core/preview?fileId={fileId}&c={fileEtag}&x=250&y=250&forceIcon=0&a=0&forceIcon=1&mimeFallback=1', {
 			fileId: node.id,
 			fileEtag: node.attributes.etag,
diff --git a/apps/files_versions/src/views/FilesVersionsSidebarTab.vue b/apps/files_versions/src/views/FilesVersionsSidebarTab.vue
index b35fe6118773b..3914c3fa8cbd0 100644
--- a/apps/files_versions/src/views/FilesVersionsSidebarTab.vue
+++ b/apps/files_versions/src/views/FilesVersionsSidebarTab.vue
@@ -73,7 +73,7 @@ const loading = ref(false)
 const showVersionLabelForm = ref(false)
 const editedVersion = ref<Version | null>(null)
 
-const currentVersionMtime = computed(() => props.node?.mtime?.getTime() ?? 0)
+const currentVersionMtime = computed(() => Math.floor(new Date(props.node?.mtime?.getTime() ?? 0).getTime() / 1000) * 1000)
 
 /**
  * Order versions by mtime.