Fix/concurrent upload issue

[Jayashsatolia403]

Changes

Fixes

Tests

Tasks to complete before merging PR:

• [ ] Ensure system tests are passing. If not Run them manually to check for any regressions :clipboard:
• [ ] Do any new system tests need added to test this change? do any existing system tests need updated? If so create a PR at 0chain/system_test
• [ ] Merge your system tests PR to master AFTER merging this PR

Associated PRs (Link as appropriate):

• 0chain:
• gosdk:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

Codecov Report

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@@               Coverage Diff                @@
##             sprint-july-2    #1175   +/-   ##
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  Hits                     ?     2330           
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  Partials                 ?      291           

Flag	Coverage Δ
Unit-Tests	25.75% <0.00%> (?)

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