Need to do a factory reset on m4300 switch

Hi

I have the following problem with a switch :

U-Boot 2012.10-00258-g1c5018gfe9 (Jul 26 2019 - 11:22:39)VerNo=1.0.0.15

UBIFS error (pid 0): ubifs_get_sb: cannot open "ubi:fs", error -19
UBIFS error (pid 0): ubifs_mount: Error reading superblock on volume 'ubi:fs' er rno=-19!

ubifsmount - mount UBIFS volume

Usage:
ubifsmount <volume-name>
- mount 'volume-name' volume
UBIFS not mounted, use ubifs mount to mount volume first!
ubifsload - load file from an UBIFS filesystem

Usage:
ubifsload <addr> <filename> [bytes]
- load file 'filename' to address 'addr'
Wrong Image Format for bootm command
ERROR: can't get kernel image!
Saving Environment to SPI Flash...
UBIFS not mounted, use ubifs mount to mount volume first!
ubifsload - load file from an UBIFS filesystem

Usage:
ubifsload <addr> <filename> [bytes]
- load file 'filename' to address 'addr'
Wrong Image Format for bootm command
ERROR: can't get kernel image!
Saving Environment to SPI Flash...
UBIFS not mounted, use ubifs mount to mount volume first!
ubifsload - load file from an UBIFS filesystem

Usage:
ubifsload <addr> <filename> [bytes]
- load file 'filename' to address 'addr'
Wrong Image Format for bootm command
ERROR: can't get kernel image!
BOOTP broadcast 1

Abort
Wrong Image Format for bootm command
ERROR: can't get kernel image!
m4300ns> <INTERRUPT>
m4300ns> <INTERRUPT>
m4300ns> ?
? - alias for 'help'
base - print or set address offset
bootm - boot application image from memory
bootp - boot image via network using BOOTP/TFTP protocol
bootz - boot Linux zImage image from memory
chpart - change active partition
cmp - memory compare
coninfo - print console devices and information
cp - memory copy
crc32 - checksum calculation
dhcp - boot image via network using DHCP/TFTP protocol
diag - perform board diagnostics
echo - echo args to console
env - environment handling commands
exit - exit script
false - do nothing, unsuccessfully
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls - list files in a directory (default /)
go - start application at address 'addr'
help - print command description/usage
i2c - I2C sub-system
iminfo - print header information for application image
itest - return true/false on integer compar

Now can I recover this situation - I accidently deleted permanent storage when trying to clear the configuration. Any help appreciated.