Tvheadend

I've tried to upgrade from 4.3.1718 and the EPG and all timers were deleted. Fortunately I restored the configuration from backup. This is the TVH startup:

Jan 18 15:40:16 myserver tvheadend[321]: main: Log started
Jan 18 15:40:16 myserver tvheadend[321]: http: Starting HTTP server 0.0.0.0:9981
Jan 18 15:40:16 myserver tvheadend[321]: htsp: Starting HTSP server 0.0.0.0:9982
Jan 18 15:40:16 myserver tvheadend[321]: config: backup: migrating config from 4.3-1718~g8e0dd2bee-dirty (running 4.3-1730~g8818b5220-dirty)
Jan 18 15:40:16 myserver tvheadend[321]: config: backup: running, output file /home/hts/.hts/tvheadend/backup/4.3-1718~g8e0dd2bee-dirty.tar.bz2
Jan 18 15:40:16 myserver tvheadend[321]: spawn: Executing "/bin/tar" 
Jan 18 15:40:19 myserver tvheadend[321]: config: backup: completed
Jan 18 15:40:19 myserver tvheadend[321]: config: loaded
Jan 18 15:40:19 myserver tvheadend[321]: config: scanfile (re)initialization with path <none>
Jan 18 15:40:19 myserver tvheadend[321]: descrambler: adding CAID 2600/FFFF as ConstCW interval 10000ms pc 20 ep default (BISS)
Jan 18 15:40:19 myserver tvheadend[321]: descrambler: adding CAID 0E00/FFFF as MultiPID interval 1000ms pc 2 ep default (PowerVu)
Jan 18 15:40:20 myserver tvheadend[321]: iptv: Using 1 input thread(s)
Jan 18 15:40:20 myserver tvheadend[321]: linuxdvb: adapter added /dev/dvb/adapter1
Jan 18 15:40:20 myserver tvheadend[321]: linuxdvb: adapter added /dev/dvb/adapter0
Jan 18 15:40:20 myserver tvheadend[321]: dvr: Creating new configuration ''
Jan 18 15:40:20 myserver tvheadend[321]: tbl-eit: EIT configuration file missing
Jan 18 15:40:20 myserver tvheadend[321]: epggrab: module psip created
Jan 18 15:40:20 myserver tvheadend[321]: epggrab: module opentv-ausat created
Jan 18 15:40:20 myserver tvheadend[321]: epggrab: module opentv-skyit created
Jan 18 15:40:20 myserver tvheadend[321]: epggrab: module opentv-skynz created
Jan 18 15:40:20 myserver tvheadend[321]: epggrab: module opentv-skyuk created
Jan 18 15:40:20 myserver tvheadend[321]: epggrab: module xmltv created
Jan 18 15:40:20 myserver tvheadend[321]: epgdb: gzip format detected, inflating (ratio 21.9% deflated size 1594287)
Jan 18 15:40:20 myserver tvheadend[321]: epgdb: parsing 7265362 bytes
Jan 18 15:40:20 myserver tvheadend[321]: epg: skipped event (!grabber) 67964509 ((null)) on Channel 5+1 @ 2019-01-18;15:15:00(+0000) to 2019-01-18;17:00:00(+0000)

Followed by several thousand similar entries as the EPG is deleted. Then the timers are deleted because their EPG entries no longer exist:

Jan 18 15:40:22 myserver tvheadend[321]: dvr: Entry df4e1e195fe88916e89700011b9b4c02 can be purged for "The Victorian House of Arts and Crafts" start 2019-01-25;21:00:00(+0000) stop 2019-01-25;22:00:00(+0000)

The line "tbl-eit: EIT configuration file missing" is strange. The file definitely exists at /usr/share/tvheadend/data/conf/epggrab/eit/config. This file was modified by commit 8818b5220c218e548556aaac8b727491ef0ab152 earlier today, but replacing the previous version doesn't stop the error message.