When you define a static const variable in the header and then declare it in the source, the linker will treat the symbol as multiply defined incorrectly. If you know the schema is changed, you can use the context menu Reload Schemas Ctrl+Shift+J to re-download the current used schema https://ifema39372.frewwebs.com/36255825/5-простых-утверждений-о-Поставщик-экспостандов-для-профессиональных-выставок-в-ifema-Мадрид-Испания-Разъяснения