fix: Negative amount check for amounts
diff --git a/erpnext/loan_management/doctype/loan/loan.json b/erpnext/loan_management/doctype/loan/loan.json
index 23996af..e8ecf01 100644
--- a/erpnext/loan_management/doctype/loan/loan.json
+++ b/erpnext/loan_management/doctype/loan/loan.json
@@ -136,6 +136,7 @@
    "fieldname": "loan_amount",
    "fieldtype": "Currency",
    "label": "Loan Amount",
+   "non_negative": 1,
    "options": "Company:company:default_currency"
   },
   {
@@ -351,7 +352,7 @@
  "index_web_pages_for_search": 1,
  "is_submittable": 1,
  "links": [],
- "modified": "2020-10-27 23:37:02.785940",
+ "modified": "2020-11-05 10:04:00.762975",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Loan",
diff --git a/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.json b/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.json
index 89f671b..cd5df4d 100644
--- a/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.json
+++ b/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.json
@@ -41,6 +41,7 @@
    "fieldname": "disbursed_amount",
    "fieldtype": "Currency",
    "label": "Disbursed Amount",
+   "non_negative": 1,
    "options": "Company:company:default_currency",
    "reqd": 1
   },
@@ -130,7 +131,7 @@
  "index_web_pages_for_search": 1,
  "is_submittable": 1,
  "links": [],
- "modified": "2020-10-16 10:04:26.229216",
+ "modified": "2020-11-06 10:04:30.882322",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Loan Disbursement",
diff --git a/erpnext/loan_management/doctype/loan_repayment/loan_repayment.json b/erpnext/loan_management/doctype/loan_repayment/loan_repayment.json
index 60b2036..2b5df4b 100644
--- a/erpnext/loan_management/doctype/loan_repayment/loan_repayment.json
+++ b/erpnext/loan_management/doctype/loan_repayment/loan_repayment.json
@@ -108,6 +108,7 @@
    "fieldname": "amount_paid",
    "fieldtype": "Currency",
    "label": "Amount Paid",
+   "non_negative": 1,
    "options": "Company:company:default_currency",
    "reqd": 1
   },
@@ -230,7 +231,7 @@
  "index_web_pages_for_search": 1,
  "is_submittable": 1,
  "links": [],
- "modified": "2020-10-10 03:49:01.827593",
+ "modified": "2020-11-05 10:06:58.792841",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Loan Repayment",
diff --git a/erpnext/loan_management/doctype/pledge/pledge.json b/erpnext/loan_management/doctype/pledge/pledge.json
index f22a21e..801e3a3 100644
--- a/erpnext/loan_management/doctype/pledge/pledge.json
+++ b/erpnext/loan_management/doctype/pledge/pledge.json
@@ -1,4 +1,5 @@
 {
+ "actions": [],
  "creation": "2019-09-09 17:06:16.756573",
  "doctype": "DocType",
  "editable_grid": 1,
@@ -49,7 +50,8 @@
    "fieldname": "qty",
    "fieldtype": "Float",
    "in_list_view": 1,
-   "label": "Quantity"
+   "label": "Quantity",
+   "non_negative": 1
   },
   {
    "fieldname": "loan_security_price",
@@ -86,7 +88,8 @@
   }
  ],
  "istable": 1,
- "modified": "2019-12-03 10:59:58.001421",
+ "links": [],
+ "modified": "2020-11-05 10:07:15.424937",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Pledge",
diff --git a/erpnext/loan_management/doctype/proposed_pledge/proposed_pledge.json b/erpnext/loan_management/doctype/proposed_pledge/proposed_pledge.json
index aee7c2c..3e7e778 100644
--- a/erpnext/loan_management/doctype/proposed_pledge/proposed_pledge.json
+++ b/erpnext/loan_management/doctype/proposed_pledge/proposed_pledge.json
@@ -1,4 +1,5 @@
 {
+ "actions": [],
  "creation": "2019-08-29 22:29:37.628178",
  "doctype": "DocType",
  "editable_grid": 1,
@@ -39,7 +40,8 @@
    "fieldname": "qty",
    "fieldtype": "Float",
    "in_list_view": 1,
-   "label": "Quantity"
+   "label": "Quantity",
+   "non_negative": 1
   },
   {
    "fieldname": "loan_security",
@@ -56,8 +58,10 @@
    "read_only": 1
   }
  ],
+ "index_web_pages_for_search": 1,
  "istable": 1,
- "modified": "2019-12-02 10:23:11.498308",
+ "links": [],
+ "modified": "2020-11-05 10:07:37.542344",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Proposed Pledge",
diff --git a/erpnext/loan_management/doctype/unpledge/unpledge.json b/erpnext/loan_management/doctype/unpledge/unpledge.json
index ee192d7..0035668 100644
--- a/erpnext/loan_management/doctype/unpledge/unpledge.json
+++ b/erpnext/loan_management/doctype/unpledge/unpledge.json
@@ -52,6 +52,7 @@
    "fieldtype": "Float",
    "in_list_view": 1,
    "label": "Quantity",
+   "non_negative": 1,
    "reqd": 1
   },
   {
@@ -62,9 +63,10 @@
    "read_only": 1
   }
  ],
+ "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2020-05-06 10:50:18.448552",
+ "modified": "2020-11-05 10:07:28.106961",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Unpledge",