Проект может быть пустым

config/RedmineTracker.sql

@@ -9,7 +9,7 @@ CREATE TABLE IF NOT EXISTS "activity" (
 	"vetro_project_id" VARCHAR,
 	"tag_id" VARCHAR NOT NULL,
 	"task_id" INTEGER,
-	"project_id" VARCHAR NOT NULL,
+	"project_id" VARCHAR,
 	PRIMARY KEY("id"),
 	FOREIGN KEY ("author_id") REFERENCES "user"("id")
 	ON UPDATE NO ACTION ON DELETE NO ACTION,