Asset tag is null

[iglov]

# dmidecode -t memory
Handle 0x1100, DMI type 17, 40 bytes                                                                                                                                                                        
Memory Device                                                                                                                                                                                               
        Array Handle: 0x1000                                                                                                                                                                                
        Error Information Handle: Not Provided                                                                                                                                                              
        Total Width: 72 bits                                                                                                                                                                                
        Data Width: 64 bits
        Size: 32 GB
        Form Factor: DIMM
        Set: 1
        Locator: A1
        Bank Locator: Not Specified
        Type: DDR4
        Type Detail: Synchronous Registered (Buffered)
        Speed: 2400 MT/s
        Manufacturer: 00CE00B300CE
        Serial Number: 31B9BEF4
        Asset Tag: 00160930
        Part Number: M393A4K40BB1-CRC  
        Rank: 2
        Configured Memory Speed: 2400 MT/s
        Minimum Voltage: 1.2 V
        Maximum Voltage: 1.2 V
        Configured Voltage: 1.2 V

# dmi.MemoryDevice()
Memory Device
        Physical Memory Array Handle: 4096
        Memory Error Information Handle: 65534
        Total Width: 72
        Data Width: 64
        Size: 32767
        Form Factor: DIMM
        Device Set: 1
        Device Locator: A1
        Bank Locator: Unknown
        Memory Type: DDR4
        Type Detail: Synchronous,Registered (Buffered)
        Speed: 2400
        Manufacturer: 00CE00B300CE
        Serial Number: 31B9BEF4
        Asset Tag: 
        Part Number: M393A4K40BB1-CRC  
        Attributes: 2
        Extended Size: 32768
        Configured Memory Clock Speed: 2400
        Minimum voltage: 1200
        Maximum voltage: 1200
        Configured voltage: 0