Seaf-fsck crashes in Pro 7.0.9?

Hello,
I just ran seaf-fsck on a repo that causes some errors in seafile.log. The process crashed after a while with the following errors:

[seafile@xxx seafile-server-latest]$ ./seaf-fsck.sh -r b6bb5186-4beb-4a98-b064-5b6c7fe5b088

Starting seaf-fsck, please wait ...

[09/24/19 09:26:09] fsck.c(599): Running fsck for repo b6bb5186-4beb-4a98-b064-5b6c7fe5b088.
[09/24/19 09:26:10] fsck.c(425): Checking file system integrity of repo Seafile(b6bb5186)...
[09/24/19 10:14:55] fsck.c(102): Repo[b6bb5186] block b6bb5186-4beb-4a98-b064-5b6c7fe5b088:bad0086f3ebd0c30be114f90736e1491b209f250 is missing.
[09/24/19 10:14:55] ../../common/block-backend-fs.c(85): [block bend] failed to open block bad0086f3ebd0c30be114f90736e1491b209f250 for read: No such file or directory
[09/24/19 10:14:55] ../../common/block-mgr.c(768): Failed to open block b6bb5186-4beb-4a98-b064-5b6c7fe5b088:bad0086f.
*** Error in `/home/seafile/seafile-pro-server-7.0.9/seafile/bin/seaf-fsck': free(): invalid size: 0x000000000170dd60 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x816b9)[0x7f029843d6b9]
/home/seafile/seafile-pro-server-7.0.9/seafile/lib/libglib-2.0.so.0(g_free+0xe)[0x7f029ce10bce]
/home/seafile/seafile-pro-server-7.0.9/seafile/bin/seaf-fsck[0x408723]
/home/seafile/seafile-pro-server-7.0.9/seafile/bin/seaf-fsck[0x4086f6]
/home/seafile/seafile-pro-server-7.0.9/seafile/bin/seaf-fsck[0x4093ed]
/home/seafile/seafile-pro-server-7.0.9/seafile/bin/seaf-fsck[0x409673]
/home/seafile/seafile-pro-server-7.0.9/seafile/bin/seaf-fsck[0x407a08]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f02983de545]
/home/seafile/seafile-pro-server-7.0.9/seafile/bin/seaf-fsck[0x407b19]

thanks
iosman