Thanks for adding 'Custom Fields' option from TrackTime Pro 1.5.0 Stable...
Some DB tables fields are set by default too short then the added 'value' is not fully booked...
As you may know some custom fields to have booked must be up to 600 digits long ... Aka the GOOGLE APPS DNS TXT DKIM that looks like this:
v=DKIM1; k=rsa; p=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXKpHLYYp98x7UzsRhzvX2Qs/hvE3Nit37razXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXDO4pZMoxzPGov/S4EeQlyL2/9k20HqFBEJMEXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXQIDAQAB
Then I strongly recomend you to modify by default the following 'varchar' DB Tables fields values
pr_database_prefix = varchar(50)
pf_value = varchar(600)
Thanks again for your attention & close support,