diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 90b350b3f32..7ae0bffd0ca 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -6385,6 +6385,16 @@ abstract class CommonObject
 							}
 						}
 					}
+				} else {
+					/**
+					We are in a situation where the current object has no values in its extra fields.
+					We want to initialize all the values to null so that the array_option is accessible in other contexts (especially in document generation).
+					 **/
+					if (is_array($extrafields->attributes[$this->table_element]['label'])) {
+						foreach ($extrafields->attributes[$this->table_element]['label'] as $key => $val) {
+							$this->array_options['options_' . $key] = null;
+						}
+					}
 				}
 
 				// If field is a computed field, value must become result of compute (regardless of whether a row exists