missing name in rdb files

Some entries in the rdb file does not contains any name,
I'm wondering if this is a failed or if its "wanted as it" (I don't get how it can be useful to have just a CRC for example)

Example: Atari - Jaguar.rdb
Its last entry only contains : { developer: '', publisher: '', crc: 0x40e1a1d0 }

Scanning the whole file list, I found 592 entries without a name property:

Atari - Jaguar.rdb: 6
Bandai - WonderSwan Color.rdb: 3
Bandai - WonderSwan.rdb: 17
Coleco - ColecoVision.rdb: 86
DOOM.rdb: 2
Epoch - Super Cassette Vision.rdb: 2
GCE - Vectrex.rdb: 2
HBMAME.rdb: 14
NEC - PC Engine - TurboGrafx 16.rdb: 24
Nintendo - Family Computer Disk System.rdb: 164
Nintendo - Game Boy Advance.rdb: 48
Nintendo - Game Boy Color.rdb: 12
Nintendo - Game Boy.rdb: 8
Nintendo - Nintendo 64.rdb: 11
Nintendo - Nintendo 64DD.rdb: 1
Nintendo - Nintendo DS.rdb: 15
Nintendo - Nintendo Entertainment System.rdb: 19
Nintendo - Satellaview.rdb: 16
Nintendo - Super Nintendo Entertainment System.rdb: 67
Nintendo - Virtual Boy.rdb: 1
RCA - Studio II.rdb: 3
SNK - Neo Geo Pocket Color.rdb: 4
SNK - Neo Geo Pocket.rdb: 1
Sega - 32X.rdb: 1
Sega - Game Gear.rdb: 5
Sega - Master System - Mark III.rdb: 4
Sega - Mega Drive - Genesis.rdb: 48
Sega - SG-1000.rdb: 2
Sony - PlayStation Portable.rdb: 1
Sony - PlayStation.rdb: 4
Watara - Supervision.rdb: 1

Is it "normal"? is there somewhere a kinda spec for the entries consistency?

Start by inspecting the nameless entries in the listed .rdb files and compare them with the repository's other RDB records. Check whether the repository documents a consistency specification; done means establishing whether CRC-only records are valid and, if not, identifying the affected records and required correction.