diff --git a/htdocs/projet/list.php b/htdocs/projet/list.php
index a924af91544..05edffb1ddb 100644
--- a/htdocs/projet/list.php
+++ b/htdocs/projet/list.php
@@ -1681,11 +1681,11 @@ while ($i < $imaxinloop) {
 					if (in_array($tmpcursor, $groupofcollpasedvalues)) {
 						print ' kanbancollapsed';
 					}
-					print '" data-html="column_'.preg_replace('/[^a-z0-9]/', '', $tmpcursor).'">';
+					print '" data-groupbyid="'.preg_replace('/[^a-z0-9]/', '', $tmpcursor).'">';
 					print '<div class="kanbanlabel">'.$langs->trans($tmpgroupbyvalue).'</div>';
 					print '</div>';	// Start and end the new column
 				}
-				print '<div class="box-flex-container-column kanban column" data-html="column_'.preg_replace('/[^a-z0-9]/', '', $groupbyvalue).'">';	// Start new column
+				print '<div class="box-flex-container-column kanban column" data-groupbyid="'.preg_replace('/[^a-z0-9]/', '', $groupbyvalue).'">';	// Start new column
 				print '<div class="kanbanlabel">'.$langs->trans(empty($groupbyvalues[$groupbyvalue]) ? 'Undefined' : $groupbyvalues[$groupbyvalue]).'</div>';
 			}
 			$groupbyold = $groupbyvalue;
@@ -1718,7 +1718,7 @@ while ($i < $imaxinloop) {
 					if (in_array($tmpcursor, $groupofcollpasedvalues)) {
 						print ' kanbancollapsed';
 					}
-					print '" data-html="column_'.preg_replace('/[^a-z0-9]/', '', $tmpcursor).'">';
+					print '" data-groupbyid="'.preg_replace('/[^a-z0-9]/', '', $tmpcursor).'">';
 					print '<div class="kanbanlabel">'.$langs->trans(empty($tmpgroupbyvalue) ? 'Undefined' : $tmpgroupbyvalue).'</div>';
 					print '</div>';	// Start and end the new column
 				}