Maybe this is somehow solvable with regex....

pkg/migration/migration.go

@@ -17,13 +17,16 @@
 package migration
 
 import (
+	"bytes"
 	"code.vikunja.io/api/pkg/db"
 	"code.vikunja.io/api/pkg/log"
 	"code.vikunja.io/api/pkg/models"
+	"github.com/go-xorm/core"
 	"github.com/go-xorm/xorm"
 	"github.com/spf13/viper"
 	"sort"
 	"src.techknowlogick.com/xormigrate"
+	"strings"
 )
 
 // You can get the id string for new migrations by running `date +%Y%m%d%H%M%S` on a unix system.
@@ -41,6 +44,15 @@ func Migrate(x *xorm.Engine) {
 		}
 	}
 
+	info := x.TableInfo(models.ListTask{}).Table
+	buf := &bytes.Buffer{}
+	err := x.DumpTables([]*core.Table{info}, buf, core.SQLITE)
+	colToRemove := "reminders_unix"
+	dump := buf.String()
+	dumpremoved := strings.ReplaceAll(dump, "`"+colToRemove+"` TEXT NULL, ", "")
+	dumpremoved = strings.ReplaceAll(dumpremoved, "`"+colToRemove+"` TEXT NULL, ", "")
+	// (, )?`updated`([A-Z ])*,?
+
 	// Because init() does not guarantee the order in which these are added to the slice,
 	// we need to sort them to ensure that they are in order
 	sort.Slice(migrations, func(i, j int) bool {
@@ -50,7 +62,7 @@ func Migrate(x *xorm.Engine) {
 	m := xormigrate.New(x, migrations)
 	m.NewLogger(log.GetLogWriter("database"))
 	m.InitSchema(initSchema)
-	err := m.Migrate()
+	err = m.Migrate()
 	if err != nil {
 		log.Log.Criticalf("Migration failed: %v", err)
 	}