Add latest changes

v2_adminpanel/init.sql

@@ -570,6 +570,37 @@ BEGIN
     END IF;
 END $$;
 
+-- Migration: Add max_concurrent_sessions column to licenses if it doesn't exist
+DO $$ 
+BEGIN
+    IF NOT EXISTS (SELECT 1 FROM information_schema.columns 
+                   WHERE table_name = 'licenses' AND column_name = 'max_concurrent_sessions') THEN
+        ALTER TABLE licenses ADD COLUMN max_concurrent_sessions INTEGER DEFAULT 1 CHECK (max_concurrent_sessions >= 1);
+        -- Set initial value to same as max_devices for existing licenses
+        UPDATE licenses SET max_concurrent_sessions = max_devices WHERE max_concurrent_sessions IS NULL;
+        -- Add constraint to ensure concurrent sessions don't exceed device limit
+        ALTER TABLE licenses ADD CONSTRAINT check_concurrent_sessions CHECK (max_concurrent_sessions <= max_devices);
+    END IF;
+END $$;
+
+-- Migration: Remove UNIQUE constraint on license_sessions.license_id to allow multiple concurrent sessions
+DO $$
+BEGIN
+    -- Check if the unique constraint exists and drop it
+    IF EXISTS (SELECT 1 FROM pg_constraint 
+               WHERE conname = 'license_sessions_license_id_key' 
+               AND conrelid = 'license_sessions'::regclass) THEN
+        ALTER TABLE license_sessions DROP CONSTRAINT license_sessions_license_id_key;
+    END IF;
+    
+    -- Add a compound index for better performance on concurrent session queries
+    IF NOT EXISTS (SELECT 1 FROM pg_indexes 
+                   WHERE tablename = 'license_sessions' 
+                   AND indexname = 'idx_license_sessions_license_hardware') THEN
+        CREATE INDEX idx_license_sessions_license_hardware ON license_sessions(license_id, hardware_id);
+    END IF;
+END $$;
+
 
 -- Migration: Add device_type column to device_registrations table
 DO $$