Translations:Questions - introduction/64/en
From LimeSurvey Manual
(5) Choose whether or not you would like to Automatically rename the question code if it already exits. If the question code already exists, enable this option to use another question code. You can also have two questions that use the same question code. However, some issues might appear if you use more complex LimeSurvey options such as the ExpressionScript or when you work with the exported data in R or SPSS (qcode becoming a value label).