My kernel version is 4.4.62-18.6, but I have this error:

mag 25 10:50:11 linux-8bb9 kernel: ERST: Error Record Serialization Table
(ERST) support is initialized.
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: CPU 0: Machine Check:
0 Bank 6: ee0000000040110a
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: TSC 0 mce: ADDR
fef1ffc0 mce: MISC 7880010086 mce: 
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: PROCESSOR 0:906e9
TIME 1495702209 SOCKET 0 APIC 0 microcode 48
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: CPU 0: Machine Check:
0 Bank 7: ee0000000040110a
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: TSC 0 mce: ADDR
fef200c0 mce: MISC 3880010086 mce: 
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: PROCESSOR 0:906e9
TIME 1495702209 SOCKET 0 APIC 0 microcode 48
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: CPU 0: Machine Check:
0 Bank 8: ee0000000040110a
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: TSC 0 mce: ADDR
fef1ce80 mce: MISC 43880010086 mce: 
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: PROCESSOR 0:906e9
TIME 1495702209 SOCKET 0 APIC 0 microcode 48
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: CPU 0: Machine Check:
0 Bank 9: ee0000000040110a
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: TSC 0 mce: ADDR
fef1ff00 mce: MISC 3880010086 mce: 
mag 25 10:50:11 linux-8bb9 kernel: mce: [Hardware Error]: PROCESSOR 0:906e9
TIME 1495702209 SOCKET 0 APIC 0 microcode 48

The bios of my dell precision 3620 is in default mode with  Model: 6.158.9
"Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz"
I don't understand why I have these errors.