Is nfc-mfclassic the right app to write a dump gained with mfoc-hardnested back to a card?

[ld21]

Hi everyone

I successfully extracted the contents of a MIFARE classic card using mfoc-hardnested using
mfoc-hardnested -f keys.txt -O extractedcard.mfd over an USB Adafruit PN532 Breakout Board:

# ./mfoc-hardnested -f keys.txt -O extractedcard.mfd 
ATS len = -20
Found Mifare Classic 1k tag
ISO/IEC 14443A (106 kbps) target:
    ATQA (SENS_RES): 00  04  
* UID size: single
* bit frame anticollision supported
       UID (NFCID1): 6d  02  b6  62  
      SAK (SEL_RES): 08  
* Not compliant with ISO/IEC 14443-4
* Not compliant with ISO/IEC 18092

Fingerprinting based on MIFARE type Identification Procedure:
* MIFARE Classic 1K
* MIFARE Plus (4 Byte UID or 4 Byte RID) 2K, Security level 1
* SmartMX with MIFARE 1K emulation
Other possible matches based on ATQA & SAK values:

Try to authenticate to all sectors with default keys...
...
...

However, when trying to write the dump back to the card using
nfc-mfclassic w a extractedcard.mfd extractedcard.mfd, the process fails with

root@nfc:/home/to# LIBNFC_LOG_LEVEL=3 nfc-mfclassic w a extractedcard.mfd extractedcard.mfd
NFC reader: Adafruit PN532 Breakout opened
Found MIFARE Classic card:
ISO/IEC 14443A (106 kbps) target:
    ATQA (SENS_RES): 00  04  
       UID (NFCID1): 6d  02  b6  62  
      SAK (SEL_RES): 08  
RATS support: no
Guessing size: seems to be a 1024-byte card
Writing 63 blocks |Failure to write to data block 1
xroot@nfc:/home/to# 

and the card remains unaltered. I'm using a fresh Kali linux and an uptodate libnfc (1.8.0).

Am I correct using nfc-mfclassic to write the dump back or should I use another program (since it identifies as a MIFARE Plus)?

Does anyone have an idea what the problem might be?
Thanks!