[dev] null formula when used in report updateconfig

atms-api/src/main/java/pwc/taxtech/atms/vat/service/impl/ReportServiceImpl.java

@@ -333,7 +333,7 @@ public class ReportServiceImpl extends VatAbstractService implements ReportServi
                     periodCellTemplateConfig.setCellTemplateConfigId(cellTemplateConfig.getId());
                     periodCellTemplateConfig.setKeyValueParsedFormula(StringUtils.EMPTY);
                     periodCellTemplateConfig.setProjectId(projectId);
-                    if (cellTemplateConfig.getFormula().contains("@")) {
+                    if (cellTemplateConfig.getFormula() != null && cellTemplateConfig.getFormula().contains("@")) {
                         String regex = "@[0-9A-Z.]+";
                         Pattern pp = Pattern.compile(regex);
                         Matcher mm = pp.matcher(cellTemplateConfig.getFormula());