How to check sensor serial numbers: Check Accessory Serial Numbers
How to Check for Duplicate Paired Accessories
If two accessories—such as door sensors or PIR motion sensors—have the same serial number, this may trigger a "Duplicate Paired Accessories" message.
How to Check Sensor Serial Numbers:
To determine if two sensors have the same serial number:
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Ensure that the sensors are not connected to the alarm panel. 
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Add one motion sensor to the alarm panel and note the serial number as shown in the video. Then remove the sensor from the panel. 
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Add the second motion sensor to the alarm panel and note its serial number as shown in the video. 
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Compare the serial numbers to see if they are identical. 
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If they are the same, contact our support team and create a support ticket at: https://www.osigodirect.com/contact 
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